| Wednesday, September 08, 2010 | |
| 09:00 - 10:30 | Wednesday Plenary | Aula Magna | |
| Chair: T. Parker/P. Siegel | |||
| PL.07 | 09:00 | Whiskers, Hyperhemispheres, and a Honeymoon |
| David Rutledge California Institute of Technology, United States |
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| PL.08 | 09:45 | Terahertz Quantum Optics with Solid-state Systems |
| Alfred Leitenstorfer University of Konstanz, Germany |
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| Recent studies on ultrafast dynamics of solids and nanostructures using few-cycle electromagnetic transients in the far and mid IR spectral regions are presented. We are able to excite with phase-locked wave forms reaching peak amplitudes beyond 1 V/Å which are comparable to inner-atomic fields. | ||
| 11:00 - 12:30 | Metamaterials 1 | Aula Magna | |
| Chair: F. Keilmann | |||
| We-A1.1 | 11:00 | Wedge-type negative index metamaterial at 0.5 THz |
| E. Lheurette1; F. Garet2; S. Wang1; K. Blary1; J.L. Coutaz2; D. Lippens1 1IEMN - Université de Lille 1, France; 2IMEP-LAHC, France |
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| Negative refraction through a metamaterial is demonstrated at 0.5 THz. This characterization is based on refraction angle determination through a prism-like structure. The measurements are performed by means of a goniometric TDS system while a numerical assessment is carried by full wave EM anal | ||
| We-A1.2 | 11:30 | Multilayer Terahertz Metamaterials: Interactions Between Layers Within the Deep-Subwavelength Limit |
| M.T. Reiten; A.K. Azad; A.J. Taylor; J.F. O'Hara; D. Roy Chowdhury Los Alamos National Laboratory, United States |
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| Layers of split-ring-resonators (SRR) are typically spaced > λ |
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| We-A1.3 | 11:45 | Terahertz Resonant Artificial Interface Layers |
| Daniel Dietze; J. Darmo; M. Martl; K. Unterrainer Vienna University of Technology, Austria |
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| Planar metamaterials, so-called metasurfaces, can efficiently be described by a modified transfer matrix formalism, that takes into account anisotropic, conductive interfaces. This method is applied for evaluation of the transmission of THz pulses through different metasurface geometries. | ||
| We-A1.4 | 12:00 | Negatively refracting plasmonic devices at THz frequencies |
| George Swift; N. Kaliteevskaya; D. Dai; M.A. Kaliteevski; A.J. Baragwanath; A.J. Gallant; J.M. Chamberlain University of Durham, United Kingdom |
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| In this paper, we present experimental results showing how appropriately designed and constructed artificial materials can be used to refract negatively terahertz frequency light without the need for the materials to have both a negative permeability and a negative permittivity. | ||
| We-A1.5 | 12:15 | Composite Left- Right Handed Metamaterials at Terahertz Frequencies |
| S. Wang1; F. Garet2; K. Blary1; E. Lheurette1; J.L. Coutaz2; D. Lippens1 1IEMN, France; 2IMEP-LAHC, France |
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| High-transmissivity left/right-handed metamaterials were fabricated and experimentally assessed at sub-millimeter wave lengths. From the frequency dependence of the scattering parameters, we show the possibility to close the gap between the left- and right-handed dispersion branches. | ||
| 11:00 - 12:30 | Near Field Devices 2 | Aula Minor | |
| Chair: G. Ghione | |||
| We-B1.1 | 11:00 | Precise analysis of Wood-Rayleigh anomalies in the terahertz transmission spectrum of a metallic hole array |
| J.L. Coutaz IMEP-LAHC, France |
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| We derive a general expression for calculating the parameters of excitation of Wood and Rayleigh anomalies observed in the transmission spectrum of a hole array with square cells. An experimental validation of the model, using THz time domain spectroscopy, is performed. | ||
| We-B1.2 | 11:30 | Electromagnetic diffraction radiation of sub-wavelength holes array excited by a point charge |
| Min Hu; Y.X. Zhang; S.G. Liu University of Electronic Science and Technology of China University, China |
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| The mechanism of this novel 3D diffraction radiation phenomenon is revealed. A rigorous theoretical solution is obtained for the problem of electromagnetic diffraction radiation of sub-wavelength holes array (SHA) excited by a point charge moving parallel to the one surface of SHA. | ||
| We-B1.3 | 11:45 | Highly Efficient Aperture Array Terahertz Band-Pass Filters |
| D.S. Bulgarevich; M. Watanabe; M. Shiwa National Institute for Materials Science, Japan |
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| Microfabricated narrow band-pass filters were developed for terahertz spectral region. Their unique features were over 100% extraordinary optical transmittance, preservation of the incident light polarization, and independence of the transmittance strength on filterfs rotation angle. | ||
| We-B1.4 | 12:00 | Fabrication of Resonant THz Mesh Filters Employing the Ultrashort- Pulse UV Laser Radiation |
| I. Kašalynas; G. Valušis; B. Voisiat; G. Račiukaitis; L. Minkevičius; V. Tamošiūnas; A. Bičiūnas; A. Krotkus Centre for Physical Sciences and Technology, Lithuania |
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| Resonant mesh filters for THz region were fabricated using ultrashort UV laser radiation. The arrays of cross-shape holes were processed in the stainless steel foil and molybdenum film on polyimide. The spectral performance of the filters was investigated experimentally and numerically. | ||
| We-B1.5 | 12:15 | Terahertz wire-grid polarizer by nanoimprinting lithography on high resistivity silicon substrate |
| L. Zhang1; J.H. Teng2; H. Tanoto2; S.Y. Yew2; L.Y. Deng3; S.J. Chua1 1Singapore-MIT Alliance, National University of Singapore, Singapore; 2Institute of Materials Research and Engineering, A*STAR, Singapore; 3National University of Singapore, Singapore |
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| Terahertz wire-grid polarizer with 500nm grating period on high resistivity silicon (100) is fabricated using nanoimprinting lithography (NIL). Preliminary results show a good polarization characteristic ranging from 0.5 to 5 THz. The method is high throughput and low cost. | ||
| 11:00 - 12:30 | Remote Sensing | Room 2 | |
| Chair: M. Ortolani | |||
| We-C1.1 | 11:00 | THz Air Photonics for Standoff Detection |
| J. Liu; B. Clough; J. Dai; X.C. Zhang Rensselaer Polytechnic Institute, United States |
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| By “seeing” the fluorescence or “hearing” the sound emitted by plasma, coherent detection of broadband THz waves by laser-induced plasma at standoff distance is feasible. We will report these recent developments in THz wave sensing with air-plasma photonics. | ||
| We-C1.2 | 11:30 | Validation of the AVTIS volcano imager radiometry – a comparison of infrared and millimetre wave thermal imagery |
| David Macfarlane1; D.A. Robertson1; M.R. James2 1University of St Andrews, United Kingdom; 2Lancaster University, United Kingdom |
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| The AVTIS remote sensing instrument is a custom built millimetre wave sensor that has been developed as a practical field tool for remote sensing of volcanic terrain at active lava domes. We present validation of the MMW radiometry of a volcanic scene by comparison with coincident infrared imagery. | ||
| We-C1.3 | 12:00 | Active Video-Rate Camera with up to 32 Detector-Pixels at 812 GHz |
| Wolff von Spiegel1; R. Henneberger2; A.K. Huhn3; P. Haring Bolivar3; H.G. Roskos1 1PI, Universität Frankfurt, Germany; 2RP GmbH, 53340 Meckenheim, Germany; 3Universität Siegen, 57076 Siegen, Germany |
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| We present an fully electronic 812GHz camera with an acquisition-rate of 10fps (one per revolution of the scanning mirror). It's based on 8-pixel subharmonic-mixing detector-arrays. The rotational-scanning telescope is designed to cover a focusing range from 2-6 m. The typical resolution is 5 mm. | ||
| We-C1.4 | 12:15 | Video-rate THz Imaging Using a Microbolometer-based Camera |
| M. Bolduc; L. Marchese; B. Tremblay; M. Doucet; H. Oulachgar; L. Le Noc; C. Alain; H. Jerominek; A. Bergeron; M. Terroux INO, Canada |
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| A THz 160 x 120 pixel array camera has been developed at INO. Real-time transmission and reflectance imaging at video rates of 30 frame/s were performed with a low-power 3 THz QCL. Various hidden objects were imaged, proving feasibility of real-time THz imaging in security screening applications. | ||
| 11:00 - 12:30 | Millimetre Wave Systems | Room 3 | |
| Chair: Y. Oda | |||
| We-D1.1 | 11:00 | Development of Alternative Concepts of Fast Switches and Combiners (FADIS-BC) for High-Power Millimeter-Wave Beams |
| Alessandro Bruschi1; E. Alessi1; W. Bin1; O. D'Arcangelo1; V. Erckmann2; W. Kasparek3; A. Moro1; V. Muzzini1; M.I. Petelin4 1Istituto di Fisica del Plasma, CNR, Italy; 2Max-Planck-Institut für Plasmaphysik (IPP), EURATOM-Association,, Germany; 3 Institut für Plasmaforschung, Universität Stuttgart, Germany; 4Institute of Applied Physics, Russian Academy of Science, Nizhny Novgorod, Russian Federation |
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| New devices and concepts for fast switching and combination of millimeter-wave beams at high power are being developed. From the first prototype measurements up to high-power running tests, their properties are increasingly known. The new concepts, their use and the status of research is reported. | ||
| We-D1.2 | 11:30 | Dual Wideband Monolithically Integrated Millimeter-Wave Passive Front-End Sub-Systems |
| J.R. Mruk1; H. Levitt2; D.S. Filipovic1; H.Z. Zhou1 1University of Colorado, United States; 2Navy Research Laboratory, United States |
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| Recent advances in micromachining have enabled development of wideband millimeter-wave antennas with integrated beamformers presented in this paper. A combination of two radiators with respective filters, both having consistent radiation patterns, is used to cover Ku- through W-band frequencies. | ||
| We-D1.3 | 11:45 | Demonstration of the self-mixing effect with a planar Gunn diode at millimeter-wave frequency |
| L.B. Lok1; C. Li1; A. Khalid1; N.J. Pilgrim2; G.M. Dunn2; D.R.S. Cumming1 1University of Glasgow, United Kingdom; 2University of Aberdeen, United Kingdom |
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| We demonstrate the operation of a truly planar Gunn diode working as a self-oscillating mixer at millimeter-wave frequency. The Gunn diode was fabricated in a GaAs/Al0.23Ga0.77As layer structure. An initial prototype yielded a measured conversion loss of around 20±2.5 dB between 30 GHz and 40 GHz. | ||
| We-D1.4 | 12:00 | Sub-Terahertz Spectroscopy Using CW Broad-Area Laser Diode |
| O. Morikawa1; K. Takano2; M. Fujita1; M. Hangyo2 1Japan Coast Guard Academy, Japan; 2Osaka University, Japan |
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| A CW broad-area laser diode (BLD) is used as a light source in the THz-TDS instead of femtosecond pulse lasers to reduce the cost of the spectroscopic system. The rapid fluctuation in the light intensity is used for generation and detection of the sub-THz radiation. | ||
| We-D1.5 | 12:15 | Physical Optics Characterization of a THz Time Domain System: UWB Leaky Lens Antenna vs. Austin Switch |
| Nuria Llombart1; A. Neto2; P.H. Siegel3 1Universidad Complutense de Madrid, Spain; 2Technical University of Delft, Netherlands; 3Caltech, United States |
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| In this work we showed that a THz time domain system based on photoconductive antennas can be improved by more than one order of magnitude by using the leaky lens antenna. The system has been analyzed by implementing a physical optics method to characterize the silicon lens. | ||
| 11:00 - 12:30 | Gyrotrons 4 | Room 7 | |
| Chair: A. Litvak | |||
| We-E1.1 | 11:00 | Generation of 5 kW/1 THz coherent radiation from pulsed magnetic field gyrotron |
| M.Y. Glyavin; A.G. Luchinin; Y.V. Rodin Institute of Applied Physics RAS, Russian Federation |
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| High power gyrotron with an improved pulsed solenoid has been developed. The output power 5 kW at the frequency 1 THz and 0.5 kW at the frequency 1.3 THz obtained. After 3500 pulses with magnetic field intensity higher than 35T no any changes at the coil operation observed. | ||
| We-E1.2 | 11:30 | Millimeter waves for NMR enhancement |
| Alessandro MACOR; E. De Rijk; S. Alberti; J.P. Ansermet; G. Boero EPFL, Switzerland |
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| By shining MMWs upon a sample, Dynamic Nuclear Polarization provides a way to enhance Nuclear Magnetic Resonance signals. We report on the two branches of our project: the EPFL effort to realize a tunable gyrotron and design consideration for coupling a MMW Gaussian beam to DNP/NMR resonators. | ||
| We-E1.3 | 11:45 | Theoretical investigation of a high efficiency and broadband sub-terahertz gyrotron |
| N.C. Chen1; T.H. Chang1; C.P. Yuan1; T. Idehara2; I. Ogawa2 1Physics Department, National Tsing Hua University, Taiwan; 2Research Center for Development of Far-Infrared Region, Fukui University (FIR FU), Japan |
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| This study investigates the electron dynamics of gyrotron interaction in a tapered waveguide and proposes an interaction structure for a 0.2-THz TE02 reflective gyro-BWO to achieve high power, broad bandwidth, and suppression of mode competition. | ||
| We-E1.4 | 12:00 | Elaboration of 260 GHz second harmonic CW gyrotron with high stability of output parameters for DNP spectroscopy |
| Vladimir Zapevalov; A.S. Fix; E. Kopelovich; S. Kornishin; A. Kotov; A. Kuftin; A. Sedov Institute of Applied Physics of Russian Academy of Sciences, Russian Federation |
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| Paper includes results of calculation, design, experiments and technical requirements for main subsystems of 258.6 GHz gyrotron with output power about 100 W with high stability of output parameters. The gyrotron setup is a main part of a complex experimental system for NDP spectroscopy | ||
| We-E1.5 | 12:15 | Fundamental and Harmonic Mode Competition in the Gyrotron Oscillator |
| Kwo Chu; S.H. Kao; C.C. Chiu; K.F. Pao National Tsing Hua University, Taiwan |
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| We present a theoretical study of the competition between fundamental and harmonic interactions in the gyrotoron oscillator. It is shown that the fundamental harmonic interaction possesses a significant advantage over the harmonic interaction. A physical interpretation is given. | ||
| 11:00 - 12:30 | Miniaturized Electronic Devices | Room 11 | |
| Chair: R.L. Ives | |||
| We-F1.1 | 11:00 | European Research on THz Vacuum Amplifiers |
| A. Di Carlo1; F. Brunetti1; C.S. Cojocarua2; D. Dolfi3; M. Dispenza4; A. de Rossi3; P. Guiset3; P. Lagagneux3; J.P. Schnell3; C. Paoloni1; M. Mineo1; G. Ulisse1; E. Tamburri1; M.L. Terranova1; A. Gohier2; A.M. Fiorello4; A. Durand5; R. Marchesin5; K. Pham5; M. Korantia6; V. Krozer7; V. Zhurbenko7; A. Secchi4; S. Megtert8; F. Bouamrane8 1University of Roma Tor Vergata, Rome, Italy; 2LPICM - Ecole Polytechnique (UMR 7647) CNRS, Palaiseau, France; 3Thales Research and Technology, Palaiseau, France; 4Selex-SI, Rome, Italy; 5Thales Electron Devices, Velizy, France; 6Technical Institute of Denmark, Copenaghen, Denmark; 7Physikalisches Institut, Universität Frankfurt, Frankfurt am Main, Germany; 8UMR137 CNRS/Thales, Palaiseau, France |
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| OPTHER (OPtically Driven TeraHertz AmplifiERs) project proposes a relevant leap in the field of THz amplification. The design and realization of 1 THz amplifier is the sum of the efforts of a consortium including the main subjects of the European academy and industry in vacuum electronics | ||
| We-F1.2 | 11:30 | Microfabricated Millimeter Wave Vacuum Electronic Devices |
| A. Bera1; G.S. Park1; O. Kwon1; M. Sattorov1; A. Srivastava1; J.Y. Kim2; J.W. Yang2; J.H. Choi2; J.H. Kim3; S.S. Chang3; R.K. Barik1; A.K. Tanwar1; S.H. Park1; I.K. Baik1 1Center for THz-Bio Application Systems, Department of Physics and Astronomy, Korea, Republic of; 2Agency for Defense Development (ADD), Korea, Republic of; 3Pohang Accelerator Laboratory (PAL), Korea, Republic of |
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| The beam-wave interaction circuit of 0.1 THz of Coupled Cavity Backward-wave Oscillator (CCBWO) is being under development based on two-step X-ray Lithography. The characteristics of the microfabrication method compared to conventional machining will be investigated through cold and hot tests. | ||
| We-F1.3 | 11:45 | Linear analysis and oscillation study on folded waveguide traveling wave tube for subterahertz radiation |
| W.Y. Yang; Z.W. Dong; Y. Dong; H.J. Zhou Institute of applied physics and computational mathematics, China |
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| The Perturbed dispersion relation in folded waveguide TWT is derived and solved using MATLAB. Calculation results show that beam voltage affects the linear growth rate significantly. And the width of the cross section, as a ¡°free¡± parameter, affects the start oscillation conditions obviously. | ||
| We-F1.4 | 12:00 | Backward Wave Oscillator for THz Frequency Range Based on Double Corrugation Slow-Wave Structure |
| Mauro Mineo1; D. Bariou2; J.F. David2; A.J. Durand2; C. Paoloni1 1University of Rome "Tor Vergata", Italy; 2Thales Electron Devices SA, France |
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| A BWO at 1 THz was designed and simulated. The introduction of the double corrugation rectangular waveguide SWS permits an effective interaction with cylindrical electron beams. The advantages of the BW operation permit remarkable performance up to 33 mW output power, in compact and realizable way. | ||
| We-F1.5 | 12:15 | Cherenkov Oscillators with Two-Dimensional Distributed Feedback |
| N.S. Ginzburg; E.V. Ilyakov; I.S. Kulagin; N.Y. Peskov; A.S. Sergeev; V.Y. Zaslavsky Institute of Applied Physics RAS, Russian Federation |
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| Possibility to use 2D distributed feedback for generation of spatially coherent radiation by rectilinear electron beams in Cherenkov type devises is discussed. Theoretical and experimental studies of Ka-band coaxial BWO with external 2D Bragg structure which operates as a synchronizer is presented. | ||
| 14:00 - 15:30 | Tomography | Aula Minor | |
| Chair: T. Yasui | |||
| We-A2.1 | 14:00 | Classic holography, tomography and speckle-metrology using a high-power terahertz FEL and real-time image detectors |
| Boris Knyazev1; A.L. Balandin2; V.S. Cherkassky3; Y.Y. Choporova4; V.V. Gerasimov1; A.A. Nikitin3; V.V. Pickalov5; M.G. Vlasenko1; D.G. Rodionov4; D.G. Esaev6; M.A. Dem'yanenko6; O.A. Shevchenko1 1Budker Institute of Nuclear Physics, Russian Federation; 2Institute of Systems Dynamics and Control Theory, Russian Federation; 3Novosibirsk State University, Russian Federation; 4Novosibirsk State Technical University, Russian Federation; 5Khristianovich Institute of Theoretical and Applied Mechanics, Russian Federation; 6Rzhanov Institute of Semicomductor Physics, Russian Federation |
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| Experiments on in-line and two-beam holography, as well as speckle photography and speckle interferometry, using high-power monochromatic radiation of a free electron laser have been carried out. Experimental and theoretical approach to tomography with monochromatic terahertz sources is presented. | ||
| We-A2.2 | 14:30 | Terahertz tomography system using fiber lasers and applications |
| Toshihiko Ouchi1; K. Kajiki1; M. Shioda1; S. Kasai1; K. Kawase2; T. Itsuji1 1Canon Inc., Japan; 2Nagoya University, Japan |
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| High depth-resolution terahertz three-dimensional tomography was developed by monocycle-like terahertz pulses using ultra-short pulse fiber lasers. We designed novel photoconductive devices such as a thin-film LT-GaAs detector on Si substrates and an LT-InGaAs emitter for the monocycle waveforms. | ||
| We-A2.3 | 15:00 | Optical Coherence Tomography System in the Terahertz Region |
| H.K. Kitahara1; M.T. Tani2; M.H. Hangyo1 1Osaka university, Japan; 2University of Fukui, Japan |
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| We have developed a terahertz frequency-domain optical coherence tomography system based on the frequency- domain spectroscopy using a photoconductive antenna and an external cavity diode laser. The observation of the axial reflectivity profile is demonstrated for a high-resistivity silicone plate. | ||
| We-A2.4 | 15:15 | Investigation of foam and glass fiber composite structures used in aerospace applications by all-electronic 3D Terahertz imaging |
| Holger Quast; A. Keil; T. Loeffler SynView GmbH, Germany |
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| We investigate how all-electronic Terahertz / Millimeter wave imaging allows the evaluation of special material structures used in aerospace applications. Structures are foam material intended for the isolation of cryogenic tanks, and glass fiber composite samples intended for several applications. | ||
| 14:00 - 15:30 | Guiding Devices 2 | Aula Minor | |
| Chair: C.W. Baik | |||
| We-B2.1 | 14:00 | Terahertz Electromagnetic Crystal (EMXT) Based Waveguide and Horn Antenna |
| Hao Xin; Z.R. Wu; W.R. Ng; M.E. Gehm University of Arizona, United States |
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| All-dielectric Terahertz waveguide and horn antenna based on hollow-core EMXT fiber are fabricated via THz rapid prototyping using polymer jetting technique. Characterization of the waveguide propagation loss shows a very good agreement with the simulation. | ||
| We-B2.2 | 14:15 | A Tunable Universal THz Filter using Artificial Dielectrics |
| Mendis; A. Nag; F. Chen; D.M. Mittleman Rice University, United States |
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| Using parallel-plate waveguides that mimic artificial dielectrics, we demonstrate a universal filter that provides tunable, low-pass, high-pass, band-pass, and band-stop filtering functionalities in the THz region. | ||
| We-B2.3 | 14:30 | Broadband transmission of terahertz radiations in thin silica tube |
| E. Nguema Agnandji; D.r. Georges Humbert; P.h.d. Denis Ferachou XLIM : institut de recherche, France |
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| Hollow-core thin silica tubes based on antiresonant guiding mechanism are studied with femtosecond terahertz (THz) setup. By controlling the parameters of the waveguide, broad transmission windows, up to 600 GHz, are demonstrated at terahertz frequencies | ||
| We-B2.4 | 14:45 | Hollow-core terahertz waveguide based on out-of-plane two-dimensional photonic band gad crystal cladding |
| Denis Ferachou; E. Nguema; G. Humbert; J.L. Auguste; J.M. Blondy Xlim Institut de recherche, France |
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| We demonstrate the propagation of teraherz (THz) radiations through a hollow-core waveguide based on a two dimensional photonic band gap crystal cladding. The measurements are done with THz Time Domain Spectroscopy (TDS). | ||
| We-B2.5 | 15:00 | Propagation loss measurements of porous THz subwavelength fibers |
| A. Dupuis; A. Mazharova; F. Desevedavy; M. Skorobogatiy Ecole Polytechnique of Montreal, Canada |
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| We report on the THz spectral loss characteristics of porous subwavelength polyethylene fibers. Propagation losses (α<0.04cm |
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| We-B2.6 | 15:15 | Improved photonic crystal based 90 |
| E. Degirmenci; F. Surre; P. Landais RINCE, Dublin City University, Ireland |
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| An improved design is proposed for 90° PhC bend waveguide. 2D numerical simulations are carried out for single-line defect in metallic band-gap crystals in square lattice structure. A significant improvement is achieved in terms of transmission (over 98 %) and bandwidth over 1 THz with the design. | ||
| 14:00 - 15:30 | Devices | Room 2 | |
| Chair: P.H. Siegel | |||
| We-C2.1 | 14:00 | Microwave Crosstalk in Lumped Element Far-IR MKIDs |
| O. Noroozian1; P.K. Day2; B.H. Eom1; H.G. LeDuc2; J. Zmuidzinas1 1California Institute of Technology, United States; 2Jet Propulsion Laboratory, United States |
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| We have made close-packed far-infrared MKID arrays with ~ 250 pixels using TiN on silicon. Measurements show a large scatter in quality factor arising from crosstalk. This is confirmed by pump-probe experiments and EM simulations. Our new shielded resonator designs show very low crosstalk levels. | ||
| We-C2.2 | 14:30 | VNA-Calibration and S-Parameter Characterization of Submillimeter Wave Integrated Membrane Circuits |
| Huan Zhao Chalmers University of Technology, Sweden |
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| A TRL-calibration kit enabling S-parameter characterization of membrane circuits has been developed for the WR-03 band. The TRL-design features 3 ìm thick GaAs membrane circuits packaged in E-plane split waveguide blocks. Membrane circuits have been characterized after the calibration. | ||
| We-C2.3 | 14:45 | Simulation of electrical and optical characteristics for InP/InGaAs/InP p-i-n photodiodes |
| x.d. wang; w.d. hu; x.s. chen; w. lu; h.j. tang; t. li; h.m. gong Shanghai Institute of Technical Physics, Chinese Academy of Sciences, China |
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| 2D simulation of dark current and photoresponse for InP/InGaAs/InP photodiode is carried out by Sentaurus DEVICE. The simulation results are in good agreement with experiments confirming that generation-recombination effect is the dominant source of dark current at low bias. | ||
| We-C2.4 | 15:00 | Sub-Terahertz resistive mixing in a AlGaN/GaN HEMT |
| K. Madjour; G. Ducournau; S. Lepilliet; T. Akalin; J.F. Lampin; M.A. Poisson; S. Delage; C. Gaquière IEMN, France |
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| An AlGaN/GaN based field effect transistor (FET) has been designed, fabricated, and used as a resistive mixer for heterodyne detection in the 140-220 GHz frequency range. Optimum biasing conditions, conversion losses and linearity are investigated. | ||
| We-C2.5 | 15:15 | Optimization of THz pulses emitted by a InGaAs photoconductive switch |
| A.S. Grimault-Jacquin; B.T. Tissafi; F.A. Aniel Institut d'Electronique Fondamentale, France |
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| We present some results concerning the optimization of the amplitude or of the band pass of the THz pulse generated by an InGaAs photoconductive inserted in a coplanar waveguide by using 3D modeling. The optical pulse intensity, pulse dimension,... compared to PC active gap is discussed | ||
| 14:00 - 15:30 | Transmission Lines | Room 3 | |
| Chair: G. Nusinovich | |||
| We-D2.1 | 14:00 | Study of High-Power Millimeter-Wave Beam Transmission for Microwave Beaming Propulsion |
| Yasuhisa Oda1; T. Yamaguchi2; Y. Shimada2; K. Komurasaki2; K. Kajiwara3; K. Takahashi3; K. Sakamoto3 1801-1, Japan; 2the university of Tokyo, Japan; 3Japan Atomic Energy Agency, Japan |
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| A high-power millimeter-wave beam transmission system for microwave beaming propulsion were designed and tested. A thruster with the transmission system consisted from a launcher and focusing mirrors was operated using a gyrotron. The thruster traveled for 3 m distance generating thrust force. | ||
| We-D2.2 | 14:30 | 2 MW CW RF Load for Gyrotrons |
| R. Lawrence Ives1; Y.N. Mizuhara2; J.M. Neilson1; P. Borchard3 1Calabazas Creek Research, Inc., United States; 2Consultant, United States; 3Dymenso, LLC, United States |
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| Gyrotrons are in development to produce 2 MW CW of RF power in the mm-wave frequency range. Developers require RF loads to test these devices at full power, and similar loads will also be required for ITER. This presentation describes development of 2 MW CW RF load to meet these requirements. | ||
| We-D2.3 | 14:45 | Transmission Line for 258 GHz Gyrotron DNP Spectroscopy |
| Grigory Denisov1; A.A. Bogdashov1; A.V. Chirkov2; V.I. Belousov2; S.Y. Kornishin2; E.M. Tai3 1Institute of Applied Physics/GYCOM, Russian Federation; 2Institute of Applied Physics, Russian Federation; 3GYCOM, Russian Federation |
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| We report the design and test of the transmission line for DNP spectrometer with 258GHz gyrotron. The 16 meter line includes mode converter, HE11 waveguides, 5 mitre bends, variable attenuator, directional couplers, calorimeter and switch. Transmission is 70 15% with 15Watt in the pure HE11 mode. | ||
| We-D2.4 | 15:00 | Design of Low Loss Single-Mode Terahertz Bragg Fibers Based on a Confinement Loss Diagram |
| Yunhua Zhang; I.D. Robertson Institute of Microwaves and Photonics, University of Leeds, UK, United Kingdom |
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| In this paper, the confinement loss diagram is combined with the modal filtering approach to design low loss single-mode terahertz Bragg fibers. The designed Bragg fiber can achieve propagation loss around 0.2 dB/m to 0.5 dB/m in the range of 0.7 THz to 1.4 THz, with only 10 layers of Bragg cladding | ||
| We-D2.5 | 15:15 | Wet Silicon Bulk Micromachined THz Waveguides for Low-Loss Integrated Sensor Applications |
| Vladimir Matvejev; C. De Tandt; W. Ranson; J. Stiens Vrije Universiteit Brussel (VUB), Belgium |
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| Wet Si bulk micromachining enables producing hexagonally shaped waveguides (WH) with superior performance and are applicable to low THz frequency range. We discuss the fabrication process, hexagonal cross-section analysis, and balance between loss mitigation and operational frequency band of WH. | ||
| 14:00 - 15:30 | Detectors 4 | Room 7 | |
| Chair: A. Luukanen | |||
| We-E2.1 | 14:00 | Superconducting hot-electron bolometer as THz mixer, direct detector and IR single-photon counter |
| Gregory Goltsman Moscow State Pedagogical University, Russian Federation |
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| We present a new generation of superconducting single-photon detectors (SSPDs) and hot-electron superconducting sensors with record characteristic for many terahertz and optical applications. | ||
| We-E2.2 | 14:30 | Optical characterization of a superconducting hotspot air-bridge bolometer |
| Sara Cibella1; M. Ortolani1; R. Leoni1; G. Torrioli1; L. Mahler2; J. Xu2; A. Tredicucci2; H.E. Beere3; D.A. Ritchie3; F. Chiarello1 1CNR/IFN, Italy; 2NEST, CNR-INFM and Scuola Normale Superiore, Italy; 3Cavendish Laboratory, University of Cambridge, United Kingdom |
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| A superconducting hotspot air-bridge bolometer (SHAB) with an on-chip lithographic terahertz antenna has been fabricated and characterized both for passive and active signal detection. | ||
| We-E2.3 | 14:45 | Uncooled suspended bolometers based on La |
| Bruno Guillet1; S. Liu1; C. Fur1; S. Wu1; J.M. Routoure1; C. Adamo2; F. Lemarie3; D. Schlom2; L. Méchin1 1GREYC (CNRS-ENSICAEN-Université de Caen Basse Normandie), France; 2Department of Materials Science and Engineering, Cornell University, United States; 3CIMAP (CNRS-CEA-ENSICAEN-Université de Caen Basse Normandie), France |
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| We report our results on uncooled La |
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| We-E2.4 | 15:00 | Cryogen-free operation of a voltage-biased superconducting bolometer |
| David Naylor1; D.J. Hayton1; Y. Zhang1; P. Mauskopf2; P.A.R. Ade2; C. Dunscombe2; K. Wood3; J. Cox3 1University of Lethbridge, Canada; 2Cardiff University, United Kingdom; 3QMC Instruments, United Kingdom |
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| We report on the performance of a Nb voltage-biased superconducting bolometer cooled by a closed cycle pulse tube cooler. The VSB has a Tc ~ 8.1 K and an operating impedance of R ~ 600 Ω. A preliminary value for the system optical noise equivalent power (NEP) = 1.8 × 10 -12 WHz-1/2 and τ = 0.6 ms. | ||
| We-E2.5 | 15:15 | High sensitive superconductor-semiconductor-superconductor THz detector. |
| D. Morozov1; P. Mauskopf1; P. Barry1; T. Brien1; M. Prest2; T. Whall2 1Cardiff University, United Kingdom; 2University of Warwick, United Kingdom |
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| We describe a high sensitivity THz detector based on the hot electron effect in a highly doped thin silicon semiconducting layer with tunnelling contacts to superconducting islands (S-Sm-S). | ||
| 14:00 - 15:30 | Novel Microdevices | Room 11 | |
| Chair: C. Paoloni | |||
| We-F2.1 | 14:00 | THz Microfabricated Vacuum Electronic Devices using Photonic Concepts |
| Gun-Sik Park; J.K. So Center for THz-Bio Application Systems, Department of Physics and Astronomy, Korea, Republic of |
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| The advances in THz VEDs adopting novel photonic concepts such as photonic crystals or plasmonics for efficient beam-wave interaction between convection electrons and THz waves are explored. | ||
| We-F2.2 | 14:30 | Experimental studies of Volume FELs with a photonic crystal |
| Alexandra Gurinovich; V.G. Baryshevsky; N.A. Belous; E.A. Gurnevich; V.A. Evdokimov; P.V. Molchanov Research Institute for Nuclear Problems, Belarus |
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| A Volume Free Electron Laser with a photonic crystal formed by metallic threads (or foils) periodically strained inside a cylindrical waveguide is studied. Operation of Volume Free Electron Laser is discussed for different configurations of the photonic crystal | ||
| We-F2.3 | 14:45 | A High-Frequency Monotron Employing Two-Dimensional, Dielectric Photonic-Crystal, Diode Resonator |
| Seong-Tae Han Korea Electrotechnology Research Institute, Korea, Republic of |
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| We propose a monotron consisting of the parallel plates (cathode and anode) spaced by periodic dielectric-rods around the emitter (photonic crystal resonator), that is the diode and resonator all in one. The transit-time effect in the resonant diode is explored to develop a high frequency device. | ||
| We-F2.4 | 15:00 | Recent Advances in Beam Optics Analyzer |
| Thuc Bui1; R.I. Ives1; M. Read1; M. Posth2 1Calabazas Creek Research, Inc., United States; 2GUI Consultant, United States |
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| Recent advances in Beam Optics Analyzer are reported to demonstrate its features and capabilities. Detailed results of several electron gun simulations and optimization will be presented. | ||
| We-F2.5 | 15:15 | MEMS Fabrications of Broadband Epsilon Negative (ENG) Metamaterial Electronic Circuit for 0.22 THz Sheet Beam TWT Application |
| Young-Min Shin; A. Baig; A. Spear; J. Zhao; D. Gamzina; C.W. Domier University of California - Davis, United States |
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| In the course of the DARPA HiFIVE (High Frequency Integrated Vacuum Electronics) program, we have investigated various MEMS techniques for micro-fabrication of electronic circuits, a ultra wideband epsilon negative (ENG) metamaterial, built in a 0.22 THz traveling wave tube (TWT) amplifier. | ||
| 16:00 - 17:45 | Spectroscopy 2 | Aula Magna | |
| Chair: M. Dressel | |||
| We-A3.1 | 16:00 | Estimation of Hydration Numbers in Aqueous Solution using THz Time Domain Spectroscopy |
| E. Jung; K. Moon; M. Lim; H. Han POSTECH, Korea, Republic of |
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| Hydration dynamics in aqueous solution has been characterized using terahertz time domain spectroscopy. Hydration water differs from bulk water and directly influences the protein dynamics. By precise measurement of dielectric constants of aqueous solutions we estimated hydration numbers accurately. | ||
| We-A3.2 | 16:30 | Terahertz Spectroscopy of Chemicals in the Liquid Phase |
| Erik Bruendermann; M. Krueger; S. Funkner; H. Weingaertner; M. Havenith Ruhr-University Bochum, Germany |
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| The multi-modal approach of GHz dielectric, terahertz and infrared spectroscopy revealed absorption and dispersion of an ionic liquid and resulted in a data set spanning 7 to 8 orders of magnitude in frequency and in absorption. Ionic liquids show comparable high absorption such as liquid water. | ||
| We-A3.3 | 16:45 | Sub-Terahertz spectroscopy in superconductors and charge-ordered materials |
| Paolo Calvani1; S. Lupi1; A. Nucara1; P. Maselli1; F.M. Vitucci1; C. Mirri1; L. Baldassarre2; M. Ortolani3 1Università La Sapienza, Italy; 2Sincrotrone Trieste, Italy; 3IFN-CNR, Roma, Italy |
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| We review the results obtained on several innovating materials by the sub-Terahertz spectroscopy which uses Coherent synchrotron Radiation as a source, and we present new data on the multiferroic LuFeO. | ||
| We-A3.4 | 17:00 | Infrared magneto-spectroscopy using quantum cascade lasers |
| Oleksiy Drachenko1; S. Winnerl1; H. Schneider1; M. Helm1; J. Leotin2 1Forschungszentrum Dresden-Rossendorf e. V., Germany; 2Laboratoire Nationale des Champs Magnetiques Intenses, France |
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| We present a magneto-transmission experimental set up covering spectral region from 5 to 120 µm. Interchangable quantum cascade lasers are used as an excitation sources. Performance of the setup is illustrated via cyclotron resonance studies of InGaAs/GaAs QWs under magnetic fields up to 60T | ||
| We-A3.5 | 17:15 | Comparative study of extraction of material parameters from THz time-domain spectroscopy performed in reflection and in transmission |
| J.L. Coutaz1; B. Blampey2; F. Garet2 1IMEP-LAHC University of Savoie, France; 2University of Savoie, France |
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| We study the uncertainties of the refractive index and coefficient of absorption of materials in the far-infrared determined from THz time-domain spectroscopy performed in reflection and in transmission. We give rules to select the most appropriate experimental technique regarding studied samples. | ||
| We-A3.6 | 17:30 | Application of THz Spectroscopy to Time-Dependent Chemical-Physical Phenomena |
| Augusto Marcelli1; P. Innocenzi2; L. Malfatti2; M. Piccinini3; U. Schade4 1INFN - LNF, Italy; 2Sassari University, Italy; 3Porto Conte Ricerche, Italy; 4Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Germany |
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| We may investigate time-dependent phenomena in a non pump-probe configuration combining a SR THz source and a IR thermal source. A “proof of concepts” experiment of the evaporation of a deuterated water droplet cast on a diamond substrate was performed simultaneously in the IR and in the THz ranges. | ||
| 16:00 - 17:45 | Instruments 2 | Aula Minor | |
| Chair: R. Beccherelli | |||
| We-B3.1 | 16:00 | 3D Imaging and Analysis System Using Terahertz Waves |
| Motoki Imamura; S. Nishina; A. Irisawa; T. Yamashita; E. Kato Advantest corporation, Japan |
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| We have developed the 3D Imaging and Analysis System that uses terahertz waves, the world's first such system for practical applications. This system has an unprecedented capability for nondestructive three-dimensional spectroscopic analysis of the spatial distribution of constituents. | ||
| We-B3.3 | 16:45 | Hybrid Continuous Wave Terahertz System |
| Matthias Stecher; M. Scheller; M. Koch Philipps-Universität Marburg, Germany |
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| We present a hybrid continuous wave terahertz system, combining a two color photomixing system with a quasi time domain spectrometer, driven by a multimode laser diode. Overcoming the ambiguity of standard continuous wave thickness measurements is shown on different samples. | ||
| We-B3.4 | 17:00 | Stabilization of the frequency difference of optically synchronized THz waves for reducing spectrometer sensitivity fluctuation |
| N. Shimizu1; N. Kukutsu1; Y. Kado1; A. Wakatsuki2; S. Kohjiro3 1NTT Microsystem Integration Labs., Japan; 2NTT Photonics Labs., Japan; 3AIST, Japan |
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| We developed a frequency difference stabilizer for an optically synchronized dual-channel THz signal generator. The stabilizer reduces the amplitude fluctuation in spectrometer signal, enabling us to instantaneously observe the spectra, whose absorption characteristics change rapidly with time. | ||
| We-B3.5 | 17:15 | THz time domain spectroscopy system using 1.55 |
| P. Crozat1; J. Mangeney1; M. Martin1; P. Mounaix2 1Institut d'Electronique Fondamentale, France; 2Centre de Physique Moleculaire Optique et Hertzienne, France |
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| We report terahertz time-domain spectroscopy system based on Er:fiber laser at 1.55 µm wavelength. Ion-irradiated In |
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| We-B3.6 | 17:30 | Progress Towards an Ultracompact cw Terahertz Spectrometer |
| Anselm Deninger1; D. Stanze2; S. Schindler1; M. Schlak2; B. Sartorius2; W. Kaenders1 1TOPTICA Photonics, Germany; 2Fraunhofer Heinrich-Hertz Institute, Germany |
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| A cw terahertz spectrometer operating without optical amplifiers and without mechanical delay line is presented. Fiber-coupled 1.5 µm DFB lasers in a butterfly housing drive a photodiode emitter, which provides 5 µW output at 0.5 THz. A coherent photoconductive receiver yields an SNR up to 75 dB. | ||
| 16:00 - 17:45 | Photomixing Generation | Room 2 | |
| Chair: R. Beigang | |||
| We-C3.1 | 16:00 | Widely Tunable Dual-Mode Multisection Laser Diode for Continuous-Wave THz Generation |
| Namje Kim1; Y.A. Leem1; J.H. Shin1; C.W. Lee1; S.P. Han1; M.Y. Jeon1; D.H. Lee1; D.S. Yee2; S.K. Noh2; K.H. Park1 1Electronics and Telecommunications Research Institute (ETRI), Korea, Republic of; 2Korea Research Institute of Standards and Science (KRISS), Korea, Republic of |
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| We demonstrate novel dual-mode laser for tunable continuous-wave (CW) THz generation with InGaAs-based photomixers. The beat frequency from this dual-mode multisection laser is continuously tuned from 0.30 to over 1.15 THz. | ||
| We-C3.2 | 16:30 | Subterahertz primary radiation source with ultra narrow spectrum: new application of femtosecond laser comb |
| M.Y. Tretyakov; S.B. Bodrov; A.P. Shkaev; A.M. Kiselev; A.V. Andrianov; D.S. Makarov Institute of Applied Physics of Russian Academy of Sciences, Russian Federation |
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| The frequency of a primary subterahertz oscillator has been stabilized by phase lock with one of the component of the terahertz frequency comb produced by femtosecond laser pulses. Stabilization allows to reach radiation spectrum with very low phase noise and less than 10 Hz bandwidth. | ||
| We-C3.3 | 16:45 | Tunable Narrow Linewidth THz-Wave Generation using Dual-Wavelength Fiber Ring Laser and Organic DAST Crystal |
| Ming Tang; T. Notake; H. Minamide; Y. Wang; H. Ito RIKEN, Advanced Science Institute, Japan |
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| We demonstrated a novel single longitudinal mode dual-wavelength fiber ring laser with continuously tunable wavelength spacing. Continuous-wave Terahertz radiation from sub-THz to 2 THz was generated through difference-frequency generation of two laser wavelengths in a nonlinear DAST crystal. | ||
| We-C3.4 | 17:00 | Continuous Wave Terahertz Photomixer from Low Temperature Grown GaAs with High Carrier Mobility |
| J.H. Teng1; H. Tanoto1; Q.Y. Wu1; M. Sun2; Z.N. Chen2; T. Htoo3; S.J. Chua4; A. Gokarna5; J.F. Lampin5; E. Dogheche5 1Institute of Materials Research and Engineering, Singapore; 2Institute for Infocomm Research, Singapore; 3National University of Singapore, Singapore; 4Institute of Materials Research and Engineering and National University of Singapore, Singapore; 5Institut d’Electronique de Microélectronique et de Nanotechnologie, CNRS, France |
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| Low temperature GaAs grown by MBE system exhibiting Hall carrier mobility of 5000 cm |
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| We-C3.5 | 17:15 | Continuous Terahertz Wave Emission Using Tunable Dual-Wavelength Erbium-doped Fiber Laser |
| Min Yong Jeon1; N.J. Kim2; J.H. Shin2; C.W. Lee2; S.P. Han2; Y.A. Leem2; D.S. Yee3; S.K. Noh3; K.H. Park2 1Chungnam National University/ETRI, Korea, Republic of; 2ETRI, Korea, Republic of; 3KRISS, Korea, Republic of |
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| We demonstrate a continuous THz emission using a low-temperature-grown InGaAs photomixer and a widely tunable dual-wavelength erbium-doped fiber laser as an optical beat source. The wavelength spacing can be tuned from 2.3 nm to 8.8 nm which corresponds to the CW THz frequency from 0.3 to 1.1 THz. | ||
| We-C3.6 | 17:30 | Narrow linewidth Terahertz Signal Generation using a Dual-Mode Semiconductor Fabry-Pérot Laser and a Uni-travelling Carrier Photodiode |
| G. Ducournau1; A. Beck1; E. Peytavit1; T. Akalin1; J.F. Lampin1; S. Latkowski2; J. Parra-Cetina2; R. Maldonado-Basilio2; P. Landais2 1IEMN, France; 2RINCE, Ireland |
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| A narrowband terahertz signal (372 GHz) generated by a uni-travelling carrier photodiode (UTC-PD) interfaced with a dual-mode Fabry-Pérot laser diode is demonstrated. The linewidth and tunability of the emitted terahertz wave are analyzed, as a function of the laser bias. | ||
| 16:00 - 17:45 | Antennas | Room 3 | |
| Chair: D. Rutledge | |||
| We-D3.1 | 16:00 | Design of a Submillimeter Microstrip Array for Beam-Scanning Applications |
| R. Camblor; S. Ver Hoeye; G. Hotopan; C. Vázquez; M. Fernández; F. Las Heras University of Oviedo, Spain |
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| A microstrip array antenna with beam-steering capabilities is presented for imaging applications, working in the frequency range of 240-279 GHz a 33 degrees beam-scanning range is achieved. Beam-Scanning is obtained by making use of variation of the beam-pointing angle due to frequency scanning. | ||
| We-D3.2 | 16:30 | Terahertz Dipole Antenna in Fabry-Perot Cavity with two sidewalls to Enhance the Directivity |
| G. Singh1; G. Singh1; K.R. Jha2; G. Singh1 1Jaypee University of Information Technology, India; 2Shri Mata Vaishno Devi University, India |
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| In this paper, the directivity enhancement mechanism of a dipole antenna placed in a Fabry-Perot type cavity is presented. The directivity of the antenna has been increased upto 19 dBi at 610 GHz. | ||
| We-D3.3 | 16:45 | Reconfigurable Vivaldi Antenna Array with Integrated Antipodal Finline Phase Shifter with Liquid Crystal for W-Band Applications |
| Matthias Hoefle; M. Koeberle; M. Chen; A. Penirschke; R. Jakoby TU Darmstadt, Microwave Engineering, Germany |
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| This paper presents a new finline phase shifter with an antipodal Vivaldi antenna. The structure offers the potential to be used in a wideband array configuration for electronic beam steering. The individual phase shift is realized by applying a DC voltage to liquid crystal inside the finline. | ||
| We-D3.4 | 17:00 | Design of a Remote Steering ECRH launcher for the Stellerator Wendelstein 7-X |
| B. Plaum1; W. Kasparek1; V. Erckmann2; H. Laqua2; C. Lechte1; M. Weißgerber2 1University of Stuttgart, Germany; 2Max-Planck-Institut für Plasmaphysik, Germany |
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| The overall design of the remote steering antenna, which is foreseen for the Stellerator Wendelstein 7-X, is presented. Issues, which arise from the integration of mitrebends and vacuum-valves, are discussed along with results from calculations and low-power measurements. | ||
| We-D3.5 | 17:15 | Development of CW Phased-array Antenna System for Electron Bernstein Heating and Current Drive Experiments in QUEST |
| Hiroshi Idei Kyushu University, Japan |
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| The phased-array antenna for EBWH/CD has been developed in the QUEST. The fields evaluated by a Kirchhoff code were in agreement with measured ones. The thermal load/stress in the CW were analyzed with a finite element code. The phased array has been fast scanned to control the polarization angle. | ||
| We-D3.6 | 17:30 | Terahertz Plasmonic Antennas: from Metals to Semiconductors |
| Audrey Berrier1; R. Ulbricht1; D. Polke2; P. Haring Bolivar2; M. Bonn1; J. Gomez Rivas1 1FOM institute AMOLF, Netherlands; 2Siegen university, Germany |
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| Plasmonic antennas at THz frequencies are promising candidates to enhance the sensitivity of THz detectors. The resonances of metallic and semiconductor antennas are compared. Experiments show the powerful advantage of semiconductors as a means for active control over the localized surface plasmons. | ||
| 16:00 - 17:45 | Detectors 5 | Room 7 | |
| Chair: E. Lheurette | |||
| We-E3.1 | 16:00 | On-chip terahertz photon manipulation |
| Kenji Ikushima1; K. Kunitani1; D. Asaoka2; S. Komiyama2; T. Ueda2; K. Hirakawa2 1Tokyo University of Agriculture and Technology, Japan; 2University of Tokyo, Japan |
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| An on-chip terahertz photon manipulation is implemented on a GaAs/AlGaAs single heterostructure crystal. In this device, terahertz photons emitted from a microscopic area are propagated on a coplanar waveguide and counted by a quantum-dot single photon detector fabricated on the same chip. | ||
| We-E3.2 | 16:30 | Development of MEMS Microbolometer Detector for THz Applications |
| E.H. Oulachgar; L. Marchese; C. Alain; P. Topart; B. Tremblay; S. Ilias; M. Bolduc; F. Williamson; G. Baldenberger; F. Genereux; J. Osouf; L. Le Noc; T. Pope; H. Jerominek; A. Bergeron Institut National d'Optique (INO), Canada |
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| INO has been actively working on extending its microbolometer technology to THz applications. Several techniques have been developed recently to improve the performance of microbolometer. This article will present these techniques and discuss some potential applications of INO THz microbolometer. | ||
| We-E3.4 | 17:00 | Optical MEMS Technologies for Multi-Spectral Infrared Sensors |
| Lorenzo Faraone1; J.S. Milne2; J. Antoszewski2; J.M. Dell2 1The University of Western Australia, Australia; 2UWA, Australia |
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| The technology for Multi-Spectral Infrared Sensors is presented. It includes the concept, modeling, experimental results as well as demonstration of the infrared sensor capable of low-voltage tuning across the SWIR and MWIR wavelength bands. | ||
| We-E3.5 | 17:15 | Photodetection Mechanisms in Floating Gate Photoconductors with Far-Infrared Quantum Well Intersubband Transitions |
| E. Ledwosinska; T. Szkopek McGill University, Canada |
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| We demonstrate two mechanisms of far-IR detection in GaAs/AlGaAs quantum wells operating as floating gate photoconductors: electron trapping in an adjacent quantum well or a DX centre layer, leading to responsivities of 100A/W and 500A/J at operating temperatures of up to 30K and 100K, respectively. | ||
| 16:00 - 17:45 | Astronomy and Environmental Studies 2 | Room 11 | |
| Chair: K. Wood | |||
| We-F3.1 | 16:00 | Characterising and calibrating the SCUBA-2 superconducting bolometer arrays for science observing |
| D. Bintley1; M.J. MacIntosh2; W.S. Holland2; D. Berry1; J.T. Dempsey1; P. Friberg1; T. Jenness1; D. Kelly2; X. Gao2; P.A.R. Ade3; W. Grainger3; L. Moncelsi3; K.D. Irwin4; G.C. Hilton4; M. Niemack4; C.D. Reitsema4; M.I. Hollister5; A. Woodcraft5; M. Amiri6; B. Burger6; E. Chapin6; A. Gibb6; M. Halpern6; D. Scott6; M. Hasselfield6; H.S. Thomas1 1Joint Astronomy Centre, United States; 2UK Astronomy Technology Centre, United Kingdom; 3Cardiff University, United Kingdom; 4NIST, United States; 5University of Edinburgh, United Kingdom; 6University of British Columbia, Canada |
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| SCUBA-2 is a 10,000 pixel wide field sub-millimeter camera which started science observing on James Clerk Maxwell Telescope (JCMT) in the spring of 2010. We present the results of characterising individual 1280 bolometer science grade sub-arrays, as well as experience from operating the instrument. | ||
| We-F3.2 | 16:30 | Superconducting Lumped Element Kinetic Inductance Resonators for millimeter, sub-millimeter and far infrared detection. |
| Simon Doyle1; P. Mauskopf1; A. Monfardini2; L. Swenson2; S. Withington3; D. Goldie3 1Cardiff University, United Kingdom; 2nstitut NEEL, CNRS & Université Joseph Fourier, France; 3Cambridge University, United Kingdom |
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| The Lumped Element Kinetic Inductance Detector (LEKID) is a superconducting detector suitable for use from the mm to FIR wavebands. Due to its simple design the LEKID can easily be fabricated into large multiplexed arrays. This presentation will provide an overview of the LEKID and its applications. | ||
| We-F3.3 | 16:45 | THz synthesizer for high resolution spectroscopy |
| Francis Hindle; G. Mouret; C. Yang; A. Cuisset; R. Bocquet Laboratoire de Physico-Chimie de l'Atmosphère, UMR CNRS 8101, France |
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| A THz synthesizer has been realized by phase locking the photomixer pump lasers to a frequency comb effectively locking the THz emission frequency of the source. This allowed the centre frequency of a molecular transition at 813 GHz to be measured with an accuracy of 20 kHz, (10 |
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| We-F3.4 | 17:00 | Estimators for the performances of the optical combiner of an adding interferometer |
| Sebastiano Spinelli1; M. Gervasi1; A. Tartari1; M. Zannoni1; C. O'Sullivan2; D. Bennet2; G. Curran2 1Università di Milano Bicocca, Italy; 2National University of Ireland, Ireland |
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| The definition of an optical system used as a signal combiner (Fizeau-like combiner) for a millimeter wave adding interferometer is described. A couple of reliable estimators of its performances is introduced and applied to a test system. | ||
| We-F3.5 | 17:15 | Development of single-material multi-layer interference filter with sub-wavelength structure for cryogenic infrared astronomical missions |
| T. Wada1; H. Makitsubo2; M. Mita1 1Japan Aerospace Exploration Agency, Japan; 2The University of Tokyo, Japan |
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| We are developing single-material (all-silicon) interference filter for cryogenic infrared instrumentation. Layers with different refractive indices and multi-layer structure are realized by sub-wavelength structure fabricated by photo lithography and wafer bonding technique, respectively. | ||
| We-F3.6 | 17:30 | Development of a far-infrared Ge:Ga monolithic array detector for SPICA (Space Infrared Telescope for Cosmology and Astrophysics) |
| S.K. Kamiya1; M.S. Shirahata2; S.M. Matsuura2; Y.S. Sawayama1; Y.D. Doi1; M.K. Kawada2; T.N. Nakagawa2; Y.C. Creten3; B.O. Okcan3; W.R. Raab4 1The University of Tokyo, Japan; 2JAXA/ISAS, Japan; 3IMEC, Belgium; 4MPE-Garching, Germany |
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| We are developing a monolithic Ge:Ga array far-infrared detector for the future space telescope SPICA. We demonstrate the performance of our detector by showing the test results of a 5x5 prototype array. It had worked properly and showed the expected performance. | ||
| 17:45 - 19:15 | Wednesday Poster | Chiostro | |
| We-P.01 | 17:45 | Design and Simulation of 140GHz Folded Waveguide Traveling Wave Tube Slow Wave Structure |
| Zhang Chen; X.J. Deng; Y.J. Wang Institute of Electronics Engineering, China Academy of Engineering Physics, China |
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| Structural parameters of a 140GHz FWTWT slow wave structure are designed. Cold characteristics such as dispersion and impedance show good agreement with those analyzed by CST and theoretical method, respectively. A test mold has been fabricated by EDM, showing the fabrication possibility in EDM. | ||
| We-P.02 | 17:45 | Design of broad-band double-beam klystron, operating in Ka– band with peak power 8 kW |
| I.A. Freydovich1; O.Y.u. Maslennikov2; A.B. Zakirov2 1FSUE R&P Corp., Russian Federation; 2FSUE, Russian Federation |
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| A seven-cavity, broadband, high-power double-beam klystron, operating in Ka– band and paced with permanent magnet focusing system is presented. | ||
| We-P.03 | 17:45 | Plasma magneto-compressional cyclotron maser |
| Sergey Golubel; D.A. Mansfeld; A.G. Shalashov; A.V. Vodopyanov IAP RAS, Russian Federation |
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| A possibility for development of sources of pulsed electromagnetic radiation based on adiabatic magnetic compression of non-equilibrium plasma confined in a mirror magnetic configuration is discussed. | ||
| We-P.04 | 17:45 | Study of W-band Sheet Beam Klystron |
| Yong Wang; C.J. Ruan; S.Z. Wang; W. Ruan Institute of Electronics, Chinese Academy of Sciences, China |
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| Simulations of W-band Sheet Beam Klystron (SBK) were done and a beam stick was fabricated. Under the beam voltage of 60kV and current of 2.6A, the beam transmission has achieved 99%. In this paper the results of both simulation and experiment are described. | ||
| We-P.05 | 17:45 | The Preliminary Experiment of Ka-band Pulsed Folded Waveguide Extended Interaction Oscillator |
| zhen hua Wu; K.C. zhang; S.G. Liu University of Electronic Science and Technology of China, China |
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| The experiment of a Ka-band folded waveguide extended interaction oscillator (FWEIO) tube, consisting of 21-gap resonator, is reported in this paper. In the FWEIO experiment, the tube generates about 330W output power at 35.5GHz with the bandwidth 180MHz, the interaction efficiency of 23%. | ||
| We-P.06 | 17:45 | UV-LIGA and DRIE Grating Microfabrication and Testing for Sheet Beam Amplifiers at 220 GHz |
| C.D. Joye1; J.P. Calame1; M. Garven2; D. Park1; R. Bass1; B. Levush1 1Naval Research Laboratory, United States; 2SAIC, United States |
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| Slow-wave sheet beam amplifiers are under development to demonstrate 50 watts CW at 220 GHz. We report on the microfabrication of amplifier gratings based on Ultraviolet Lithography techniques using the SU-8 Photoresist for thick films. Deep Reactive Ion etching has also been investigated. | ||
| We-P.07 | 17:45 | Microresonator for Terahertz and Infrared Technologies |
| V.L. Semenenko1; V.G. Leiman1; A.V. Arsenin1; A.D. Gladun1; V.I. Ryzhii2 1Moscow Institute of Physics and Technology (State University), Russian Federation; 2University of Aizu, Japan |
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| Electron density oscillations in high electron mobility transistor with a cylindrical gate electrode are studied. We present an accurate analysis of the resonance characteristics for oscillations in a two-dimensional electron gas in such a device. | ||
| We-P.08 | 17:45 | Low capacitance vacuum microtriode for high frequency operation |
| Giacomo Ulisse; F. Brunetti; A. Di Carlo University of Rome Tor Vergata, Italy |
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| In this work a new triode geometry has been designed to reduce the this cathode-gate capacitance with respect to the classic Spindt Type microtriodes. With this configuration, the cut off frequency has been increased up to 160 GHz, about 3 times bigger when compared to the standard configuration. | ||
| We-P.09 | 17:45 | A Vector Finite Element Helmholtz Solver |
| Thuc Bui1; M. Read1; R.L. Ives1; H. Freund2 1Calabazas Creek Research, Inc., United States; 2Science Applications International Corp., United States |
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| The vector finite element method is used to solve the inhomogeneous Helmholtz equation to obtain the 3D circuit fields in resonant cavities. Numerical results will be shown for cylindrical and rectangular geometries to confirm the theoretical error estimates. | ||
| We-P.10 | 17:45 | Square Helix TWT for THz Frequencies |
| Mikko Kotiranta1; V. Krozer1; V. Zhurbenko2 1Goethe-Universität Frankfurt am Main, Germany; 2Technical University of Denmark, Denmark |
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| A traveling-wave tube (TWT) for THz frequencies has been designed and simulated. The slow-wave structure (SWS) of the TWT is a helix with a square form and therefore compatible with the technology. 3-D particle-in-cell simulations indicate a gain of 20 dB at a frequency of 900 GHz. | ||
| We-P.11 | 17:45 | Parametric Study on the Effect of the Dielectric and Geometric Properties on the Parasitic Oscillations in Gyrotron Beam Tunnels |
| G.P. Latsas1; I.G. Tigelis1; M.D. Moraitou1; S. Kern2; J.L. Vomvoridis3; Z.C. Ioannidis1 1University of Athens, Faculty of Physics, Greece; 2Karlsruhe Institute of Technology (KIT), Institute of Pulsed Power and Microwave Technology (IHM), Germany; 3National Technical University of Athens, School of Electrical and Computer Engineering, Greece |
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| Using the numerical code Fishbone, developed to study the parasitic oscillations in gyrotron (conventional and coaxial) beam tunnels, a parametric study is performed on the effect of the dielectric material as well as of the slot geometry on the growth rate of the developed parasitic modes. | ||
| We-P.12 | 17:45 | Effect of Electric Field Distribution in the Magnetron-Injection Gun Region on Electron Beam Characteristics in Gyrotrons |
| O. Louksha; D. Samsonov; G. Sominski; A. Tsapov St. Petersburg State Polytechnical University, Russian Federation |
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| A method for control of electric field distribution in the near-cathode region of a magnetron-injection gun has been developed. The possibility to improve quality of the helical electron beam by regulated non-uniformities of electric field is studied experimentally and using computer modeling. | ||
| We-P.13 | 17:45 | Gyrotrons FU FU CW VII for 600 MHz and 300 MHz DNP-NMR spectroscopy |
| Toshitaka Idehara1; K. Kosuga1; L. Agusu1; I. Ogawa1; R. Dupree2; H. Takahashi2; M.E. Mark2 1University of Fukui, Japan; 2University of Warwick, United Kingdom |
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| For DNP-NMR spectroscopy, we need high power sub-THz radiation sources with the output power of several tens watts. We have developed Gyrotrons FU CW VII operating in 200 GHz band and 400 GHz band as radiation source for 600 MHz and 300 MHz DNP-NMR spectroscopy. | ||
| We-P.14 | 17:45 | Simulation and Experimental Investigations on Dynamic After Cavity Interaction (ACI) |
| Stefan Kern1; K.A. Avramidis2; O. Dumbrajs3; G. Gantenbein1; S. Illy1; A. Samartsev1; A. Schlaich1; M. Thumm1; A.R. Choudhury1 1Karlsruhe Institute of Technology, Germany; 2SECE, National Technical University of Athens, Greece; 3 ISSP, University of Latvia, Latvia |
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| Stationary after cavity interaction (ACI) in high power gyrotrons is known as influence factor on efficiency. But it can also result in oscillations, which modulate the generated millimeter-wave or inhibit their generation. Investigations on such dynamic processes are presented. | ||
| We-P.16 | 17:45 | Mode Identification of a gyrotron oscillation by utilizing an IR camera |
| Yoshinori Tatematsu; T. Saito; T. Ozeki; S. Hashimoto Research Center for Development of Far-Infrared Region, University of Fukui, Japan |
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| Oscillation modes in the gyrotron FU CW I were successfully identified with an infrared camera. The position of temperature increase on the target depends on the oscillation mode. A clear relation holds between the position and m/χ' |
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| We-P.17 | 17:45 | Gyrotron Interaction Simulations with Tapered Magnetostatic Field |
| K.A. Avramides1; O. Dumbrajs2; J.L. Vomvoridis1; S. Kern3 1National Technical University of Athens, Greece; 2ISSP, University of Latvia, Latvia; 3Karlsruhe Institute of Technology, Campus North, IHM, Germany |
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| We investigate the interaction of the electron beam with the RF wave in a gyrotron, in the presence of an axially tapered magnetic field. The simulation results of three interaction codes are compared and the different modelings are discussed. | ||
| We-P.18 | 17:45 | Monochromatic, Wide Tunable Terahertz-wave Spectrometer Working at Room Temperature |
| G. GUO1; L. Lim2; P. Paulose1; G. Gong1; M. Minamide3; I. Ito3 1Institute for Infocomm Research, Singapore; 2Nanyang Technological University, Singapore; 3RIKEN Advanced Science Institute, Japan |
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| Using a surface-emitted THz parametric oscillator, a MgO: LiNbO3-based frequency up-conversion detector and a special optical design for fast frequency tuning and achromatic THz-wave detection, we realized a room-temperature-operated THz frequency-domain spectrometer (THz-TDS) | ||
| We-P.19 | 17:45 | Generating Pure Circular TEmn Modes |
| Tsun-Hsu Chang National Tsing Hua University, Taiwan |
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| This work presents a methodology of exciting a pure circular TEmn modes using cascaded Y-type power dividers at low terahertz region. The measured transmissions are high and the bandwidths are broad. These Y-type converters are structurally simple but the machining errors are critical. | ||
| We-P.20 | 17:45 | Electron gun design for large orbit axis encircling beams |
| C.G. Whyte; A.R. Young; C.W. Robertson; A.D.R. Phelps; W. He; A.W. Cross; K. Ronald University of Strathclyde, United Kingdom |
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| Large orbit axis encircling electron beams provide improved coupling and mode selectivity in certain gyro-devices. Three alternate gun designs for producing large orbit axis encircling electron beams are described and compared. Experimental results for one of these designs are presented. | ||
| We-P.21 | 17:45 | Investigate the interaction between a sheet electron beam and a Gaussian gyrotron beam, with the aim of significantly amplifying the RF beam. |
| Giorgos Anastassiou; J.L. Vomvoridis National Technical University of Athens, Greece |
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| The Gaussian RF beam of a gyrotron can be applied as an input for the interaction with a high-current sheet electron-beam drifting along an external magnetic field, with the aim of generating an even higher RF power and without the need for feedback from the walls of any cavity or resonator. | ||
| We-P.23 | 17:45 | Fiber-coupled terahertz endoscope system for human body |
| T.I. Jeon1; Y.B. Ji1; S.H. Kim1; E.S. Lee1; J.H. Son2 1Korea Maritime Univ., Korea, Republic of; 2University of Seoul, Korea, Republic of |
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| we have made a miniaturized optical fiber coupled THz endoscope system for human body. The cross section of the endoscope head is (2 ¡¿ 4 mm) ¡¿ 6 mm, which is small enough to be inserted into a human body. For a feasibility test, we measure reflective THz signals from several samples. | ||
| We-P.24 | 17:45 | Electro-optic field and power detector of a new generation |
| Juraj Darmo; K. Unterrainer Vienna University of Technology, Austria |
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| An electro-optic detector of electromagnetic waves with boosted performance is presented. Detector utilizes a quasi phase-matching and a heterodyne detection technique to achieve an order of magnitude better responsivity. | ||
| We-P.25 | 17:45 | A TeraHertz Thermal converter is designed to demonstrate an absolute auto-calibrated THz 2D fullfield powermeter |
| J.P. Caumes1; S. Salort1; C. Pradere2; B. Chassagne1; J.C. Batsale3 1ALPhANOV, France; 2TREFLE laboratory, France; 3TREFLE Laboratory, France |
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| we defined the Terahertz Thermal Converters concept to design a device for 2D THz imaging. Coupled to an infrared temperature flux sensors, we demonstrate an absolute auto-calibrated Terahertz power-meter (>10µW) enable to characterized THz spatial beam profile of CW sources. | ||
| We-P.26 | 17:45 | A bolometer operated at room temperature for detecting signal at 0.2 THz |
| L. Kang; L. He; X.C. Tu; J. Chen; B.B. Jin; P.H. Wu School of Electronic Science and Engineering, Nanjing University, China |
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| This paper reports the performance of a Nb5N6 thin film bolometer operated at room temperature and 0.2 THz. The best attainable electrical responsibility of Nb5N6 bolometer is about -600 V/W at a current bias of 0.4 mA. | ||
| We-P.27 | 17:45 | Investigations of room temperature bolometers for THz applications |
| Sofiane Ben Mbarek1; T. Baron1; S. Euphrasie1; D. Briand2; B. Cretin1; P. Vairac1; R. Adam3; L. Chusseau3; J.P. Guillet3; A. Penarier3 1FEMTO-ST, dép MN2S, France; 2Ecole Polytechnique Fédérale de Lausanne, Switzerland; 3IES Montpellier, France |
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| We investigate in this work the performance of two configurations of room temperature bolometers dedicated to THz applications. Fabrication processes, noise level, sensitivity and resolution characterizations are presented. Results emphasize the efficiency of the proposed approach. | ||
| We-P.28 | 17:45 | IR synchrotron radiation imaging dedicated to bunch-by-bunch beam diagnostics |
| G.L. Zangari; A. Bocci; A. Drago; A. Marcelli LNF-INFN Frascati, Italy |
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| A new complex of time domain beam diagnostic tools integrated with SHT congruent calculus allows a full bunch by-bunch image of electrons and positrons synchrotron radiation IR emission at the Φ-Factory DAΦNE. | ||
| We-P.29 | 17:45 | Realization of Wide-Bandwidth and Dual-Frequency Artificial Magnetic Conductor by Metamaterials |
| Tong Zhang; J.Y. Qin Department of Radio Engineering, Southeast University, China |
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| The design, simulation and analysis of artificial magnetic conductors (AMCs) are presented. The full-wave simulation results verify that the magnetic conductor is successfully accomplished at central frequencies 7 GHz and 16.5GHz with the bandwidth of 2.4GHz and 4.3GHz. | ||
| We-P.30 | 17:45 | Electrical Properties of VO |
| L.N. Son; T. Tachiki; T. Uchida National Defense Academy, Japan |
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| Well axis-oriented V |
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| We-P.31 | 17:45 | THz metamaterials using aligned metallic or semiconductor nanowires |
| A. Mazhorova1; J.F. Gu1; S. Gorgutsa1; M. Peccianti2; R. Morandotti2; T. Ozaki3; M. Tang3; H. Minamide3; H. Ito3; M. Skorobogatiy1 1Ecole Polytechnique de Montreal, Génie Physique, Canada; 2INRS, Varennes, Canada; 3RIKEN, Japan |
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| We study the transmission of THz radiation through metamaterial films containing metallic or semiconductor nanowires. The nanowire arrays are made by the stack-and-draw fiber fabrication technique. Metal embedded films exhibit polarizing properties, in contrast with those containing semiconductor. | ||
| We-P.32 | 17:45 | Terahertz Plasmonic Structures Based on Metal-insulator Phase Transition Materials |
| C.L. Wang; Z. Tian; Q.R. Xing; F. Liu; Y.F. Li; L. Chai; C.Y. Wang Tianjin University, China |
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| We demonstrate thermally tunable plasmonic structures base on a metal-insulator transition material with active control over their resonant transmission induced by surface plasmon polaritons (SPPs). The THz transmission property is found to be strongly dependent on the external excitations. | ||
| We-P.33 | 17:45 | Dielectric behavior of water in THz influenced by alkali and alkaline-earth halides |
| Satoshi Yamauchi1; K. Takayama1; Y. Imai1; K. Takeya2; M. Tonouchi2 1Ibaraki University, Japan; 2Osaka University, Japan |
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| A transmission type THz-TDS was applied to study dielectric behavior of water including NaCl and MgCl |
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| We-P.34 | 17:45 | Dynamical Franz-Keldysh Effect in GaAs Induced by Monocycle Terahertz Pulse |
| Keisuke Shinokita1; H.H. Hirori2; M.N. Nagai2; N.S. Sato3; Y.K. Kadoya3; K.T. Tanaka2 1Department of Physics, Graduate School of Science, Kyoto University, Japan; 2Kyoto University, Japan; 3Hiroshima University, Japan |
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| We studied electron-hole behaviors interacted with intense THz pulse in GaAs MQW. THz pulse causes strong modulations of exciton in absorption spectrum. For high THz electric fields, hh exciton energy shows blueshift proportional to THz electric field squared, due to dynamical Franz-Keldysh effect. | ||
| We-P.35 | 17:45 | The optical properties of metal rectangular hole arrays in terahertz regime |
| Guohong Ma Shanghai University, China |
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| THz transmission through thin metallic hole array was investigated. The results reveal that extraordinary transmission in THz frequency is originated from waveguide resonances, the function of SPP acts as a band-cut filter in transmission spectra, our model shows a good agreement with literatures. | ||
| We-P.36 | 17:45 | High Q-factor Planar Terahertz Metamaterials |
| I. Al-Naib; C. Jansen; N. Born; M. Koch Philipps-Universität Marburg, Germany |
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| We propose asymmetric D-split resonators, which feature a very high Q-factor, as unit cells for terahertz filters and sensors. Compared to asymmetric double split resonators, the asymmetric D-split resonators exhibit twice as high Q-factors. | ||
| We-P.37 | 17:45 | Submm Wave Flux-Flow Oscillator with Suppression of Voltage Fluctuations |
| A.S. Sobolev1; O.S. Kiselev2 1Kotel’nikov Institute of Radio Engineering and Electronics RAS, Russian Federation; 2Kotel'nikov IREE RAS, Russian Federation |
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| The flux-flow oscillator voltage and therefore frequency are independently controlled by the dissipative bias current and the external magnetic field. We experimentally observed narrowing of the FFO radiation linewidth caused by inducing magnetic field noise anticorrelated to bias current noise. | ||
| We-P.38 | 17:45 | Multiple THz Surface Plasmon Resonances of Periodic Split Ring Arrays in Silicon |
| S. Saha1; J. Alton2; Y. Ma1; D.R.S. Cumming1; J. Grant1 1UNIVERSITY OF GLASGOW, United Kingdom; 2TERAVIEW LTD., United Kingdom |
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| FDTD simulations of periodic split ring resonators in highly doped silicon show multiple THz surface plasmon resonances (SPR). The SPR frequency position may be tuned by modifying the split ring wall width and/or the split angle. These frequency tunable resonators are efficient THz detectors. | ||
| We-P.39 | 17:45 | Millimeter-wave diffraction of a micro-fabricated crystal structure |
| Ching-Pin Yuan Department of Physics, National Tsing Hua University, Taiwan |
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| A two-dimensional, table-top diffraction system is developed in 20x20 cm size with a 94GHz (~3.2 mm) terahertz source. The crystalline structure was micro-fabricated using UV-lithograph with height of 1.0 mm, radius of 0.2 mm, and lattice separation of 2.25 mm. | ||
| We-P.40 | 17:45 | Design of Photonic Crystal Folded Waveguide |
| QianZhong Xue; Y.L. LI; Z. Yuan Institute of Electronics, Chinese Academy of Sciences, China |
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| A folded waveguide composed of dielectric photonic crystal material is designed and its in-plan propagation characteristics are studied by calculating the dispersion diagram using finite difference frequency domain algorithm and analyzing the electromagnetic wave guiding by FDTD. | ||
| We-P.41 | 17:45 | Sub Wavelength Structured Filters for Terahertz Region |
| S. HAYASHI1; T. ISEKI2; H. HIRAI2; K. SAKAI2; Y. OGAWA3; K. KAWASE4 1RIKEN, Japan; 2RICOH, Japan; 3Kyoto University, Japan; 4Nagoya University and RIKEN, Japan |
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| The transmission and refection characteristics of a terahertz wave through sub wavelength structured (SWS) filters are investigated. The SWS filters are grating made by plastic. We designed the SWS filters as a wavelength selective optics and measured transmission and refection spectra. | ||
| We-P.42 | 17:45 | Trilayer Electron-beam Lithography and Surface Preparation for Sub-micron Schottky Contacts on GaAs Heterostructures |
| Donatella Dominijanni1; R. Casini1; V. Foglietti1; M. Ortolani1; C. Lanzieri2; M. Peroni2; P. Romanini2; A. Notargiacomo3; E. Giovine3 1CNR-Istituto di Fotonica e Nanotecnologie, Italy; 2SELEX Sistemi Integrati, Rome, Italy; 3CNR - Istituto di Fotonica e Nanotecnologie, Rome, Italy |
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| Foreseen operation at sub-THz frequencies of Schottky contacts for diodes and transistor gates on GaAs based heterostructures requires area reduction down to 0.1x1 microns, and wet chemical processes. We report on the compatibility of Trilayer Electron-beam Lithography with such wet processes. | ||
| We-P.43 | 17:45 | Spectral analysis of subterahertz resonant system by Josephson admittance spectroscopy |
| Irina Gundareva1; O.Y. Volkov2; Y.Y. Divin3; V.N. Gubankov4; V.V. Pavlovskiy4 1Kotel'nikov Institute of Radioengineering and Electronics, Russian Federation; 2Kotel'nkov Institute of Radioengineering and Electronics RAS, Russian Federation; 3Forschungszentrum Jülich, Germany; 4Kotel'nikov Institute of Radioengineering and Electronics RAS, Russian Federation |
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| Josephson admittance spectroscopy was used for spectral analysis of electromagnetic structure, based on broadband antenna with modified log-periodic geometry, which provides pronounced resonance at 114 GHz. Measured spectral characteristics of this structure were compared with simulated ones. | ||
| We-P.44 | 17:45 | Terahertz Form Birefringent Devices |
| Maik Scheller1; C. Jördens2; M. Koch1 1Philipps-Universität Marburg, Germany; 2TU Braunschweig, Germany |
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| We present photonic crystals exhibiting a pronounced form birefringence at terahertz frequencies. These crystals can be employed as volumetric birefringent elements for a broad frequency range. Along with a theoretical discussion we demonstrate measurement results of a polymeric crystal. | ||
| We-P.45 | 17:45 | Development of mechanically detected ESR in terahertz region |
| S.H. Hirano1; N.M. Mizuno1; E.O. Ohmichi1; H.O. Ohta2 1Graduationg school of Kobe University, Japan; 2Molecular Photoscience Research Center, Kobe University, Japan |
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| We have developed a high-frequency ESR technique using a cantilever. In this method, magnetization change caused by ESR is detected as cantilever deflection. In this study, spin sensitivity as high as 109 spins/Gauss was achieved. Signal detection at 315 GHz was also succeeded. | ||
| We-P.46 | 17:45 | THz surface plasmon reflection on a corrugated metal surface |
| Maxim Nazarov1; A.A. Angeluts1; A.P. Shkurinov1; J.L. Coutaz2 1 Physics Department of M.V.Lomonosov Moscow State University, Russian Federation; 2IMEP-LAHC, UMR CNRS 5130, Université de Savoie, France |
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| Bragg reflection of surface THz plasmon (SP) on a grating is studied using SP broadband excitation by a prism. The SP spectra transmitted through the grating exhibit minima thanks to Bragg phenomena. Reflection efficiency and bandwidth of those minima are studied for different grating groove shapes | ||
| We-P.47 | 17:45 | Field localization of a broadband THz surface plasmon |
| Maxim Nazarov1; A.P. Shkurinov1; A.Y. Ryabov1; E.A. Bezus2 1Physics Department of M.V.Lomonosov Moscow State University, Russian Federation; 2Image Processing Systems Institute of the Russian Academy of Science, Russian Federation |
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| We perform a broadband excitation of surface THz plasmon in Otto prism configuration. Spectral dependencies of penetration depth and propagation length are studied. Propagation through a dielectric slab of various thickness is discussed. | ||
| We-P.48 | 17:45 | Anti-reflection coated lenses for THz applications |
| Giorgio Savini1; P. Hargrave2 1University College London, United Kingdom; 2Cardiff University, United Kingdom |
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| We have developed a repeatable and reliable technique for anti-reflection coating large lenses for use at THz frequencies. Small lenses are already in use on two satellites. Comparison of experimental and modelled performance of larger (up to 350 mm diam.) highly-curved lenses is discussed. | ||
| We-P.49 | 17:45 | Open single-mode cavities for millimeter and submillimeter wavelengths |
| M. Fittipaldi1; M. Martinelli2; G. Annino2 1INSTM - Dipartimento di Chimica, Università di Firenze, Italy; 2Istituto per i Processi Chimico-Fisici, CNR, Italy |
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| The development of single-mode cavities with high conversion factor based on the concept of non-radiative structure is presented, together with the first experimental results at the border between the millimeter and the submillimeter wavelengths and beyond. | ||
| We-P.50 | 17:45 | Substrateless micrometric metal mesh for mid-infrared plasmonic sensors |
| Odeta Limaj1; F.M. Mattioli2; M.O. Ortolani2; R.L. Leoni2; S.L. Lupi1 1CNR-IOM Laboratorio Tasc, Dipartimento di Fisica, Università di Roma “La Sapienza”, Italy; 2CNR-Istituto di Fotonica e Nanotecnologie, via Cineto Romano 42, 00156 Rome, Italy |
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| Large area substrateless films periodically patterned were fabricated. The measured mid-infrared (IR) spectra display resonant features with high Q-factor due to the interaction of the radiation with Surface Plasmon (SP) modes on both faces of the film. The devices can be used for SP-based sensors. | ||
| We-P.51 | 17:45 | Testing and analysis of bicrystal Josephson junction mixer¡¯s conversion efficiency at THz |
| T. Hua; D.C. Li; W.W. Xu; J. Chen; L. Kang; B.B. Jin; P.H. Wu Department of Electronic Science and Engineering,Research Institute of Superconductor Electronics,Na, China |
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| This paper is a research on the conversion efficiency of high-temperature superconductivity bicrystal Josephson junction mixer. Relationship between conversion efficiency and local oscillation power, microwave signal power, harmonic order, bias electric current, etc., has been tested and analyzed. | ||
| We-P.52 | 17:45 | Enhancement of THz field in a gap of dipole antenna |
| Y. Kadoya1; H. Tanaka1; Y. Sugitani1; J. Kitagawa1; F. Blanchard2; H. Hirori2; A. Doi3; M. Nagai2; K. Tanaka2 1Hiroshima University, Japan; 2Kyoto University, Japan; 3Olympus Corporation, Japan |
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| We investigated the THz field enhancement in dipole antennas. Numerical simulation showed an enhancement factor of 70 in a 150 μm-long antenna at 1 THz. The simplicity of the structure may fit to the intense THz field-material interaction research, attracting a lot of recent interests. | ||
| We-P.53 | 17:45 | Two-Dimensional Photonic Crystals Fabricated by Wet Etching of Silicon |
| J.I. Kim1; S.G. Jeon1; G.J. Kim1; J.H. Kim1; H.H. Lee2; S.H. Park3 1Korea Electrotechnology Research Institute, Korea, Republic of; 2Chosun University, Korea, Republic of; 3Yeungnam University, Korea, Republic of |
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| Two-dimensional photonic crystals (PCs) are fabricated by using the wet chemical etching of high-resistivity silicon. The formation of the photonic-band-gap at a frequency of about 100 GHz is demonstrated by the measured and the 3D FDTD simulated transmittance of the transverse-magnetic (TM) mode. | ||
| We-P.55 | 17:45 | Frequency Propagation Characteristics for Two-Dimensional Photonic Crystals Using Terahertz-Time Domain Spectroscopy (THz-TDS) |
| G.J. Kim; J.I. Kim; S.G. Jeon; J.H. Kim Korea Electrotechnology Research Institute, Korea, Republic of |
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| We report frequency propagation characteristics for two-dimensional photonic crystal using terahertz time-domain spectroscopy. The transmission frequency spectrum obtained by the 3D FDTD simulation and the experiment, and the frequency range of stop bands is in good agreement with the results | ||
| We-P.56 | 17:45 | Investigation of reflection-type cone condenser used for THz detectors |
| M. Aoki1; S. Tripathi2; N. Hiromoto2 1Shizuoka Universtiy, Japan; 2Shizuoka University, Japan |
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| We have made a THz triangle cone condenser which is lower in cost and easier to fabricate and has higher efficiency than Winston cone. The sharpness of field of view (FOV) can be improved by attaching a baffle to the condenser. | ||
| We-P.57 | 17:45 | Wire-grid polarizer in the terahertz region fabricated by nanoinprint technology |
| K. Takano1; I. Morimoto2; H. Yokoyama3; M. Hangyo1 1Osaka University, Japan; 2ASAHI KASEI Corp., Japan; 3ASAHI KASEI E-MATERIALS Corp., Japan |
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| Wire-grid polarizers in the terahertz region have been fabricated by nanoinprint technology on flexible substrates. They show ideal polarization property whereas the cost is very low. | ||
| We-P.58 | 17:45 | Pinch harmonic analogue of terahertz nanoresonator control using metal nano-rods |
| H.R. Park1; S.M. Koo1; Y.M. Park1; M.A. Seo1; O.K. Suwal2; Q. Park3; S.S. Choi2; N.K. Park1; K.J. Ahn1; D.S. Kim1 1Seoul National University, Korea, Republic of; 2Sun Moon University, Korea, Republic of; 3Korea University, Korea, Republic of |
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| We demonstrate that platinum nano-rods across the gap of a nanoresonator shift or overdamp the resonance depending on the rod-size. Moreover, what is striking is that the smallest nano-rods almost completely turn off both the fundamental and higher mode resonances, analogous to the pinch harmonics. | ||
| We-P.59 | 17:45 | Broadband polymer microstructured THz fiber coupler with down-doped cores |
| K. Nielsen1; H.K. Rasmussen2; O. Bang2; P.U. Jepsen1 1Technical UNiversity of Denmark, Denmark; 2Technical University of Denmark, Denmark |
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| We demonstrate a broadband THz directional coupler based on a dual core photonic crystal fiber (PCF) design with mechanically down-doped core regions. For a center frequency of 1.3 THz we demonstrate a bandwidth of 0.65 THz. | ||
| We-P.60 | 17:45 | Frequency Modulation for Continuous Wave Terahertz Spectroscopy |
| Maik Scheller1; T. Kinder2; O. Peters1; T. Müller-Wirts2; M. Koch1 1Philipps-Universität Marburg, Germany; 2TEM Messtechnik GmbH, Germany |
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| We propose a frequency modulation for continuous wave terahertz spectroscopy to replace conventional delay lines. We show that this technique in combination with a lock-in amplifier allows for a single sampling point detection of the amplitude and phase of the terahertz signal. | ||
| We-P.61 | 17:45 | A two axis mm-wave goniometer probe-head. Applications to (HF) |
| C.A. Massa IPCF-CNR, Italy |
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| A probe-head with a two axis mm-wave goniometer (TAG) is presented. The test of the TAG, obtained with a single crystal high field high frequency electron paramagnetic resonance ((HF)2EPR) spectroscopy experiment, shows a resolution and reproducibility of the order of 1 degree up to 300 GHz. | ||
| We-P.62 | 17:45 | Broadband THz Vacuum Window using Impedance Matching Approach |
| A. Srivastava; O.J. Kwon; M. Sattorov; A. Sharma; A. Tanwar; G.S. Park Center for THz-Bio Application Systems, Korea, Republic of |
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| A practical pillbox window design was performed using impedance matching approach for use in THz vacuum electron devices. The fabricated W-band miniature window assembly showed broad frequency band ~ 8 GHz for VWSR less than 1.22 | ||
| We-P.63 | 17:45 | Comparative simulation study of ZnTe heating effects in focused THz radiation generation |
| H. Lin1; B.M. Fischer2; D. Abbott1 1The University of Adelaide, Australia; 2Institut Franco-Allemand de Recherches de Saint Louis, France |
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| With prolonged intense exposure of an optical beam on the ZnTe crystal, the problem of crystal photodamage becomes increasingly relevant. In reducing the risk of damage, practically this has meant a decrease in optical power density. The heating effects with a reduced power density are investigated. | ||
| We-P.64 | 17:45 | Terahertz Emission from InAs and InSb under a 1.55 |
| Christopher Que; H. Nakajima; M. Tani Research Center for Development of Far-Infrared Region, University of Fukui, Japan |
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| Terahertz (THz) emission from a 1.55 µm laser excitation on InAs and InSb was investigated. InAs still showed a much higher emission as compared to InSb that differs from earlier reports. Semiconductor quality or different surface conditions could be the cause of this unexpected result. | ||
| We-P.65 | 17:45 | Wavelength Tunable Characteristics of Mid-Infrared Intracavity 3-micron Waveband Light Source with 805-nm-band Laser Diode Excitation |
| N. Yamamoto1; K. Akahane1; T. Kawanishi1; N. Yamamoto2; R. Naitou2; H. Sotobayashi2 1National Institute of Information and Communications Technology, Japan; 2Aoyama Gakuin University, Japan |
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| A wavelength tunable mid-infrared 3-micron waveband light source with an effective intracavity system is successfully demonstrated using a high-performance 805-nm-band laser diode excitation. Advantages include wide-tunability (approx. 90-nm), simple wavelength controllability, and small footprint. | ||
| We-P.66 | 17:45 | Terahertz Emission from Lithium Ternary Chalcopyrite Crystals |
| Kei Takeya1; Y. Takemoto1; T. Matsukawa2; M. Yoshimura2; I. Kawayama1; H. Murakami1; Y. Mori2; M. Tonouchi1 1Institute of Laser Engineering, Osaka University, Japan; 2Graduate School of Engineering, Osaka University, Japan |
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| We have investigated the terahertz (THz) emission from lithium ternary chalcopyrite crystals illuminated by 1560-nm femtosecond pump laser pulses. Monocyclic THz emission and narrowband THz emission from the coherent phonons in LiInSe2 and LiGaSe2 were observed at 2.87 and 3.45 THz, respectively. | ||
| We-P.67 | 17:45 | Propagation of THz Field through a Tapered Parallel-plate Waveguide |
| T.I. Jeon; E.S. Lee; Y.B. Ji Korea Maritime University, Korea, Republic of |
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| We present terahertz field propagation through input- and output-side tapered parallel-plate waveguide (TPPWG). Coupling of the TPPWG having a 3¡Æ slop angle improved the measured THz amplitude by over 100%, unlike the cylindrical silicon lens used in the PPWG. | ||
| We-P.68 | 17:45 | Enhanced Terahertz Transmission of GaN Quantum Wells |
| J. Torres1; T. Laurent1; R. Sharma1; P. Nouvel1; S. Blin1; L. Chusseau1; C. Palermo1; L. Varani1; Y. Cordier2; M. Chmielowska2; J.P. Faurie3; B. Beaumont3; E. Starikov4; E. Shiktorov4; V. Gruzinski4 1Institut d'Electronique du Sud UMR 5214 - Universite Montpellier 2, France; 2Centre de Recherche sur l'Hétéro-Epitaxie et ses Applications, UPR 10 - CNRS, rue Bernard Grégory, 0, France; 3Lumilog, 2720, Chemin Saint Bernard, Les Moulins I, 06220 Vallauris, France, France; 4Semiconductor Physics Institute, A. Gostauto 11, 2600 Vilnius, Lithuania, Lithuania |
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| Terahetz transmission spectra at 15 K of GaN HEMTs are investigated. Enhanced signals in the transmission spectra interpreted as preliminary indications of the activation of the OPTTR mechanism can be considered as a relevant step in the development of devices capable to produce THz radiations. | ||
| We-P.70 | 17:45 | Terahertz Emission from InP Photoconductive Antenna Excited by a 1.56 |
| K. Serita; G. Chen; S. Mizuno; H. Murakami; I. Kawayama; M. Tonouchi Institute of Laser Engineering, Osaka University, Japan |
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| Terahertz (THz) emission property of Fe-implanted InP photoconductive antenna (PCA) has been studied by 1.56 µm wavelength excitation. The obtained experimental data by THz time-domain spectroscopy measurements shows that the possibility of two-photon excitation in the THz emission process. | ||
| We-P.72 | 17:45 | THz radiation from InAs surfaces with photonic crystal structures under optical excitation |
| C.S. Kee; C. Kang; H.K. Yoo; I.B. Sohn Advanced Photonics Research Institute/ GIST, Korea, Republic of |
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| We investigated the characteristics of THz radiation from a n-type InAs wafer with a triangular array of air holes under optical excitation. We observed the power enhancement of THz radiation from the InAs surface surrounded by the air holes in a frequency range | ||
| We-P.73 | 17:45 | Novel Terahertz Source from cold atoms inside a cavity |
| C.l. Zhang1; J.W. Ye2 1captial normal university, China; 2captial normal university, United States |
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| The phase diffusion mode is a emergent energy scale due to the many body physics of the U(1) Dicke model, so it can be tuned by the number of atoms N into many different ranges of frequencies from Microwave to Terahertz to Infrared | ||
| We-P.74 | 17:45 | THz radiation from GaAs surfaces with metallic nano-dot arrays under optical excitation |
| C. Kang1; H.K. Yoo1; J.W. Lee1; C.S. Kee1; H.S. Jung2; G.Y. Jung2 1Advanced Photonics Research Institute/ GIST, Korea, Republic of; 2Department of Materials Science and Engineering/ GIST, Korea, Republic of |
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| We present characteristics of THz radiation from GaAs wafers with metallic nano-dot arrays under optical excitation. Metallic nano-dots were introduced by a nano-imprinting technique. We found that the metallic nano-dot arrays can make the bandwidth of THz radiation from GaAs surfaces narrow. | ||
| We-P.75 | 17:45 | Semiconductor superlattices for THz frequency region- reality and perspective |
| Dmitry Pavelyev1; Y.I. Koschurinov2; V.M. Ustinov3; A.E. Zukov3; D.G. Pavelyev1; D.G. Pavelyev4; A.E. Zukov3 1Nizny Novgorod State University, Russian Federation; 2Nizny Novgorod STATE University, Russian Federation; 3Ioffe Physico-Technical Institute, St.Petersburg, Russian Federation; 4Nizhny Novgorod State University, Russian Federation |
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| Now superlattices demonstrate capability for high resolution spectrometer up to 3THz, room temperature operation as well as 77K and 4K. The real situation in the practice application for THz frequency region for different system and perspective of improving their parameters are discuss | ||
| We-P.76 | 17:45 | Transverse dynamics of the surface wave excited by wide electron beam |
| A.E. Fedotov; P.B. Makhalov Institute of Applied Physics of RAS, Russian Federation |
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| According to simulations, a stationary single-mode operation of the surface-wave microwave generator excited by a wide beam is possible up to the beam width of at lest 10 wavelengths. | ||
| We-P.78 | 17:45 | 390-480 GHz Photon-assisted tunneling steps generated by parallel Josephson tunnel junction arrays |
| Faouzi Boussaha1; A. Feret2; C. Chaumont2; L. Pelay2; M. Batrung2; B. Lecomte2; M. Salez3; F. Dauplay2; J.M. Krieg2; G. Beaudin2; L. Lapierre4; D. Bouville5 1JPL, United States; 2Observatoire de Paris, France; 3Obervatoire de Paris, France; 4CNES, France; 5IEF - Orsay, France |
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| We report on the first direct detection of submillimeter waves emitted by small parallel tunnel junction arrays. They are specially suited for applications such as clock for RSFQ electronics or as local oscillator for THz superconducting integrated receivers. | ||
| We-P.79 | 17:45 | Terahertz Generation with Tilted-Front Laser Pulses: Dynamical Theory Predicts the Ways to Higher Terahertz Yield |
| M.I. Bakunov1; S.B. Bodrov2; M.V. Tsarev1; E.A. Mashkovich1 1University of Nizhny Novgorod, Russian Federation; 2Institute of Applied Physics, Russian Federation |
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| A dynamical theory of terahertz emission from a femtosecond laser pulse with tilted intensity front in an electro-optic crystal is developed. Applying the theory to GaAs pumped by a fiber laser and cryogenically cooled LiNbO3 pumped by a Ti:sapphire laser predicts the ways to higher terahertz yield. | ||
| We-P.80 | 17:45 | A monolithic 280 GHz HBV frequency tripler |
| Tomas Bryllert1; A.Ö. Olsen2; J. Vukusic3; J. Stake3 1Chalmers University of Technology; 2Wasa Millimeter Wave AB, Sweden; 3Chalmers University of Technology, Sweden |
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| We present the design and measurements of a Heterostructure Barrier Varactor based frequency tripler for 280 GHz. The tripler is fabricated as a monolithic circuit on an InP substrate. Several circuit versions for input power levels between 100 mW and 1 W have been designed. | ||
| We-P.82 | 17:45 | THz Surface Plasmons on 1D Plasmonic Metamaterials with Disorder |
| G.S. Park; J.K. So Center for THz-Bio Application Systems, Department of Physics and Astronomy, Korea, Republic of |
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| The excitation of propagating THz surface plasmons on 1D plasmonic metamaterials with disorder is studied using convection electrons. The introduction of disorder is found to support non-Bloch surface plasmons and reduce the mode competition between the excited surface plasmons. | ||
| We-P.83 | 17:45 | Conductor Loss Models of Slot-line MMIC Structure |
| Payal Majumdar; A.K. Verma University of Delhi South Campus, India |
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| We present two closed-form models for the computation of the conductor loss of the slot line. The model #A uses the Wheeler’s incremental inductance rule and the model #B uses the concept of the stopping distance.The accuracy of both the models is compared against full-wave and experimental sources. | ||
| We-P.84 | 17:45 | Antenna Measurement System Operating at W and J Millimeter Wave Bands |
| A. Muñoz-Acevedo1; M. Sierra-Castañer2; J.L. Besada2 1ETSI Telecomunicación, Spain; 2Technical University of Madrid, Spain |
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| A millimeter wave antenna measurement system is presented. The frequencies of operation are around 100 GHz and 300 GHz (W/J Bands). The facility is a single reflector compact range system. Design tasks deal with the serrated reflector and the corresponding millimeter wave instrumentation design. | ||
| We-P.85 | 17:45 | Design of Sierpinski Carpet Antenna using two different feeding mechanisms for WLAN applications |
| A. Aggarwal1; M.V.K. Kartikeyan2 1Indian Institute of Technology Roorkee, India; 2IIT Roorkee, India |
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| In this work, a printed antenna for WLAN application is designed, which is working at 2.4 GHz and 5.2 GHz. The printed antenna uses the fractal geometry i.e., sierpinski carpet to design the antenna. This paper discusses the design steps to achieve the desired resonance characteristics. | ||
| We.P-86 | 17:45 | On the Size Reduction of Microstrip Antennas with DGS |
| Machavaram Kartikeyan; A.K.A. Arya IIT Roorkee, India |
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| The Electromagnetic bandgap (EBG) structures have been used to improve the performance of the antennas. In this work, an extensive design study of some specific antennas will be presented. | ||
| We-P.87 | 17:45 | Design Studies of Stacked U-Slot Microstrip Patch Antenna for Dual Band Operation |
| H.T. Harshvardhan Tiwari; M.V.K. Kartikeyan Machavaram IIT Roorkee, India |
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| In this work, an extensive design study of a stacked U-slot microstrip patch antenna for dual band operation will be presented. This antenna consists of two stacked microstrip patches, both having U-slots embedded in them. | ||
| We-P.88 | 17:45 | Four-Leaf Clover-Shaped Antenna on an Extended Hemispherical Lens for a High-Output-Power THz Photomixer |
| T.K. Nguyen1; I. Park1; I. Woo1; H. Lim1; H. Han2 1Ajou University, Korea, Republic of; 2POSTECH, Korea, Republic of |
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| A four-leaf-clover-shaped antenna composed of a highly resonant radiation element and a stable DC feed element and mounted on an extended hemispherical lens is described. The proposed antenna was optimized to have maximum total efficiency and maximum directivity on an extended hemispherical lens. | ||
| We-P.89 | 17:45 | Study for high transmission efficiency in long distance transmission line |
| Yasuhisa Oda; K. Kajiwara; K. Takahashi; K. Sakamoto Japan Atomic Energy Agency, Japan |
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| The transmission mode purity in ITER relevant long distance transmission line was measured. Although the transmission power included 95% HE11 at the input of the transmission line, HE11 power was reduced as 91% after long distance transmission because of mode conversion loss. | ||
| We-P.90 | 17:45 | Designing of High-Q Slow-Wave Coplanar Strips for CMOS MMICs |
| Ali Karami Horestani; S. Al-Sarawi; D. Abbott The University of Adelaide, Australia |
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| The effect of geometric dimensions of slow-wave coplanar strips on Q-factor, Z |
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| We-P.91 | 17:45 | Easily - Manufacturable Waveguide to Microstrip Submm-Wave Transition |
| R. Camblor; S. Ver Hoeye; G. Hotopan; C. Vázquez; M. Fernández; F. Las Heras University of Oviedo, Spain |
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| An easily manufacturable waveguide to microstrip transition is presented for the 300 GHz frequency band. The transition can be tuned by varying the position of the short-circuit of the waveguide. The transition has been manufactured using PCB laser prototyping machinery. | ||
| We-P.92 | 17:45 | Radiation pattern measurements of an integrated TEM horn antenna |
| Jean-Francois Lampin; G. Ducournau; A. Beck; D. Ducatteau; E. Peytavit; T. Akalin IEMN, France |
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| A TEM horn antenna is integrated with a uni-travelling-carrier photodiode. Its radiation pattern is measured from 280 to 540 GHz thanks to a 1.55 µm photomixing set-up and a sub-harmonic mixer. The direction of the main lobe shifts to a lower incidence when the frequency is increased. | ||
| We-P.93 | 17:45 | Ultra-thin mm-wave absorbers based on high-impedance metasurfaces |
| S.A. Kuznetsov1; M. Navarro-Cia2; A.V. Gelfand3; N.I. Fedorinina3; A.V. Arzhannikov1; M. Beruete2; F. Falcone2; M. Sorolla2 1Budker Institute of Nuclear Physics SB RAS / Novosibirsk State University, Russian Federation; 2Millimeter and Terahertz Wave Laboratory, UPNA, Spain; 3Novosibirsk Branch of Institute of Semiconductor Physics SB RAS 'TDIAM', Russian Federation |
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| The investigation results for electrically ultra-thin absorbers based on high-impedance metasurfaces designed for narrowband absorption at millimeter waves are presented. The resonant absorptivity ~90% is demonstrated experimentally at resonant bandwidth ~3-10% and wavelength-to-thickness ratio>60. | ||
| We-P.94 | 17:45 | Layered Medium Response to THz Laser Pulse from Plasmonic Diffraction Grating Using FDTD |
| D.S.V. Alves; A.J.F. Orlando Instituto Tecnologico de Aeronautica, Brazil |
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| FDTD Analysis applied to guided-radiation modes coupling in a diffraction grating considering light-metal interaction yielding surface modes is presented. The radiation propagates into a layered biologic medium. The diffraction grating is fine designed to couple modes efficiently in the THz band. | ||
| We-P.95 | 17:45 | Design Optimization of Meta-Material Transmission Lines for Linear and Non-Linear Microwave Signal Processing |
| R. Marcelli1; S. Simion2; G. Bartolucci3; E. Proietti4; G. De Angelis4; A. Lucibello4 1CNR-IMM Roma, Italy; 2National Institute for Research and Development in Microtechnologies, Romania; 3University of Rome “Tor Vergata”, Department of Electronics Engineering, Italy; 4CNR – IMM Roma, Italy |
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| The possibility to use CRLH (Composite Right-/Left-Handed) cells to realize both distributed wide-band filters for linear signal processing and non-linear devices like frequency doublers is investigated analytically and numerically. | ||
| We-P.97 | 17:45 | Optimization of pinhole photon sieves model based on Fresnel zone plates |
| Oleg Minin Novosibirsk State Technical University, Russian Federation |
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| a photon sieve can overcome the limitations of Fresnel zone plates. In this work, we shall present an optomization and analysis based on the model of the pinhole photon sieve. The optimization method is based on concept of a reference phase. | ||
| We-P.98 | 17:45 | The Experimental Study on the Incident Polarization in the Transmission through the Array |
| Jia jia Chengdu University of Information Technology, China |
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| We study the phenomenon of extraordinary transmission through arrays of subwavelength hole with different incident polarization degrees. It shows that not only the p- polarization but also other polarization can support extraordinary transmission and the high order modes can be excited in the hole. | ||
| We-P.99 | 17:45 | THz Surface Plasmon Polaritons Propagation along Metal Nanowire |
| L. Zhao Chinese Academic of Engineering Physics, China |
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| Terahertz (THz) surface plasmon polaritons (SPPs) propagation along metal wire of nanometer scale is studied. An analytical theory is deduced to describe the propagation properties of THz SPPs. Propagation properties are discussed based on this model. | ||