Tuesday, September 07, 2010

	09:00 - 10:30	Tuesday Plenary	Aula Magna
		Chair: P. Richards

PL.05	09:00	The AKARI mission
		Hiroshi Murakami JAXA - Institute of Space & Astronautical Science -, Japan
PL.06	09:45	Infrared and Far Infrared radiation in the analysis of atmospheric components
		Donal Murtagh Chalmers University of Technology
		This presentation will present a summary of the work on atmospheric processes that has been made possible by a the launch of new infrared and mm-wave instruments during the last 10 years.

	11:00 - 12:30	Spectroscopy 1	Aula Magna
		Chair: X. Shen

Tu-A1.1	11:00	Photoreflectance spectroscopy with a Fourier-transform infrared spectrometer: from visible to far infrared
		Jun SHAO; W. Lu National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy o, China
		Recent progress in photoreflectance spectroscopy at the Shanghai Institute of Technical Physics was reviewed, with the focus on the extension of functional spectral range for the first time from 5 μm to FIR of 20 μm and the application to narrow-gap semiconductors and nanostructure materials.
Tu-A1.2	11:30	Detection of hydrogen cyanide in the smoke emitted from the combustion of nylon fabric with a continuous-wave THz spectrometer
		N. Shimizu; Y. Kado NTT Microsystem Integration Labs., Japan
		Smoke emitted from the combustion of nylon fabric is studied. Transmission loss of IR light in the smoke was much larger than that of THz waves. THz absorption spectra showed the existence of HCN in the smoke. These results prove the advantage of THz waves for remote gas sensing at disaster sites.
Tu-A1.3	12:00	Comparing spectra from Time Domain Spectrometers and a polarizing Fourier Transform Spectrometer.
		Giorgio Savini1; I.C. Ho2; J. Dai2; X.C. Zhang2; C. Tucker3; P.A.R. Ade3; P.D. Mauskopf3; G. Zhao4 1University College London, United Kingdom; 2Rensselaer Polytechnic Institute, United States; 3Cardiff University, United Kingdom; 4Capital Normal University Beijing, China
		We have performed spectroscopic measurements on a set of materials and metal mesh grids with a THz Fourier transform spectrometer and two THz Time domain spectrometers and compared both the results and the noise properties of two different spectroscopic techniques.
Tu-A1.4	12:15	Terahertz Spectroscopy of Double Metal Quantum Cascade Structures
		M. Martl; J. Darmo; D. Dietze; C. Deutsch; A. Benz; M. Brandstetter; K. Unterrainer; P. Klang; A.M. Andrews; W. Schrenk; G. Strasser; E. Gornik Vienna University of Technology, Austria
		The coupling of broadband Terahertz pulses into metal-metal terahertz quantum cascade lasers is presented. A characterization of terahertz generation on the subwavelength quantum cascade laser facet is investigated in configuration of two separately driven sections of quantum cascade laser.

	11:00 - 12:30	Array Imaging	Aula Minor
		Chair: D. Robertson

Tu-B1.1	11:00	A multi-element THz imaging system
		F. Eichhorn1; L. Høgstedt1; J.C.D. Buron1; R.K. Olsson1; A. Kusk2; J. Dall2; P.U. Jepsen1 1DTU Fotonik, Denmark; 2DTU Space, Denmark
		We report on a broadband multi-element THz imaging system based on fiber-coupled, integrated photoconductive emitters and detectors. 32 detectors and 32 emitters are arranged in a planar array. Advanced image reconstruction algorithms are employed to reconstruct an object in the imaging plane.
Tu-B1.2	11:30	Multichannel THz imaging using arrays of photoconductive antennas
		S. Wohnsiedler1; M. Kolano1; J. Klier1; M. Herrmann1; J. Jonuscheit1; R. Beigang1; E. Peytavit2; J.F. Lampin2 1Fraunhofer Institute for Physical Measurement Techniques IPM, Germany; 2Institute of Electronics, Microelectronics and Nanotechnology IEMN, France
		In a new approach we report on a THz imaging system with arrays of horn-type photoconductive switches emitting in-plain. Aim is to combine the flexibility and sensitivity of THz antennas with the measurement speed of electro-optic sampling.
Tu-B1.3	11:45	Imaging above 1 THz Limit with Si-MOSFET Detectors
		Franz Schuster1; H. Videlier2; M. Sakowicz2; F. Teppe2; D. Coquillat2; B. Dupont1; A. Siligaris1; L. Dussopt1; B. Giffard1; W. Knap2 1CEA-LETI, MINATEC, CEA-Grenoble, France; 2Université Montpellier2 and CNRS UMR 5650, France
		We demonstrate that a proper antenna and transistor design can provide high responsivity for Terahertz radiation and imaging capability even above the 1 THz limit with a low-cost 130 nm CMOS technology. This result opens the way to CMOS THz imagers with high spatial resolutions – down ~300 μm.
Tu-B1.4	12:00	THz uncooled microbolometer array development for active imaging and spectroscopy applications
		François SIMOENS1; S. Pocas2; J. Meilhan2; J.L. Ouvrier-Buffet2; T. Maillou3; P. Gellié4; S. Barbieri4 1CEA Leti-MINATEC, France; 2CEA-LETI, MINATEC, France; 3CEA Le Ripault, France; 4Université Paris 7, France
		A first prototype of 320x240 antenna-coupled un-cooled a-Si micro-bolometers array has been designed and processed. Beam profiles emitted by THz QCLs have been imaged while different samples were introduced in the THz beam optical path. We report first essays of material identification.
Tu-B1.5	12:15	Talbot effect in the terahertz spectral range
		Boris Knyazev1; V.S. Cherkassky2; Y.Y. Choporova3; V.V. Gerasimov1; M.G. Vlasenko1 1Budker Institute of Nuclear Physics, Russian Federation; 2Novosibirsk State University, Russian Federation; 3Novosibirsk State Technical University, Russian Federation
		Talbot effect in the terahertz spectral range has been first observed and applied to metrology applications: measurement of distance, determination of radiation wavelength and detection in real-time of wavefront distortion.

	11:00 - 12:30	Electronic Generation	Room 2
		Chair: R. Logan

Tu-C1.1	11:00	THz Oscillators Using Resonant Tunneling Diodes at Room Temperature
		Masahiro Asada; S. Suzuki Tokyo Institute of Technology, Japan
		THz oscillators using resonant tunneling diodes are reported. Fundamental oscillation up to 0.95 THz was obtained until now. This is the highest fundamental frequency of room-temperature electronic single oscillators. Structures for high output power and spectral characteristics were also reported.
Tu-C1.2	11:30	Increase of Fundamental Oscillation Frequency in Resonant Tunneling Diode with Thin Barrier and Graded Emitter Structures
		S. Suzuki1; A. Teranishi1; M. Asada1; H. Sugiyama2; H. Yokoyama2 1Tokyo Institute of Technology, Japan; 2NTT Photonics lab., Japan
		We obtained frequency increase of resonant tunneling diodes using graded emitter for improving the transit delay, and thin barrier structures for reduction of the tunneling time. The oscillation frequency of 951 GHz was observed for an RTD with 0.43-ƒÊm^2-mesa area and 20-ƒÊm-long antenna.
Tu-C1.3	11:45	Measurements of THz emission from nanometric-size transistors
		J. Torres1; P. Nouvel1; H. Marinchio1; T. Laurent1; S. Blin1; L. Chusseau1; C. Palermo1; L. Varani1; P. Shiktorov2; E. Starikov2; V. Gruzinski3; F. Teppe4; D. Coquillat4 1Institut d'Electronique du Sud UMR 5214 - Universite Montpellier 2, France; 2Semiconductor Physics Institute, A. Gostauto 11, 2600 Vilnius, Lithuania, Lithuania; 3S, Lithuania; 4Groupe d'Etude des Semiconducteurs UMR 5650 CNRS, Université Montpellier 2, 34095 Montpellier, Franc, France
		Measurements of terahertz resonant emission due to the excitation of plasma waves by an optical beating inside AlGaAs/InGaAs/InP high electron mobility transistor is reported at 300 K and 200 K.
Tu-C1.4	12:00	Tunable room temperature THz emission from AlGaN/GaN high electron mobility transistors
		Nina Dyakonova1; A. El Fatimy2; Y. Meziani3; T. Otsuji4; D. Coquillat1; W. Knap1; F. Teppe1; S. Vandenbrouk5; K. Madjour5; D. Theron5; C. Gaquiere5; M.A. Poisson6; S. Delage6 1GES, UMR5650, Université Montpellier II, France; 2Cardiff School of Physics and Astronomy, Cardiff University, United Kingdom; 3Departamento de Física Aplicada, Universidad de Salamanca, Spain; 4RIEC, Tohoku University,, Japan; 5IEMN, UMR CNRS 8520, Villeneuve d’Acsq, France; 6Thalès, Thales Research and Technology, Orsay, France
		We present experimental results on the Terahertz radiation from high electron mobility transistors at room temperature, which clearly show the tunability of the emission frequency by the gate voltage.
Tu-C1.5	12:15	Theoretical Study on Terahertz Wave Detection and Radiation Based on Semiconductor Nano Structures
		W.D.C. Chu; S.Q.D. Duan; W.Z. Zhang Institute of Applied Physics and Computational Mathematics, Beijing, China
		We study the magnetic-field-modulated terahertz absorption spectra of a real GaAs quantum ring and present a possible way to realize tunable detection of terahertz ??elds. We also explore the terahertz radiation from high order harmonics in a coupled triple quantum dots driven by gigahertz waves.

	11:00 - 12:30	Biology 1	Room 3
		Chair: G.S. Park

Tu-D1.1	11:00	In-Line Monitoring of Coating Thickness of Pharmaceutical Tablets during Production Scale Film Coating by Terahertz Imaging
		Axel Zeitler1; R.K. May1; M.J. Evans2; S. Zhong3; I. Warr4; L.F. Gladden1; Y.C. Shen3 1University of Cambridge, United Kingdom; 2TeraView Ltd, United Kingdom; 3University of Liverpool, United Kingdom; 4Oystar-Manesty, United Kingdom
		We present preliminary results from in-line terahertz pulsed imaging measurements of coating thickness on pharmaceutical tablets made during production-scale film coating. Results of real-time TPI measurements are compared to sample tablets removed at discrete time-intervals during production
Tu-D1.2	11:30	Near-Infrared Spectroscopy for Non-destructive Coating Analysis Calibrated by Terahertz Pulsed Imaging
		Yaochun Shen1; S. Zhong2; H. Shen2; M.J. Evans3; R.K. May4; J.A. Zeitler4; I. Warr5 1University of Liverpool, United Kingdom; 2Department of Electrical Engineering and Electronics, University of Liverpool, L69 3GJ, UK, United Kingdom; 3TeraView Ltd., St. John¡¯s Innovation Park, Cambridge CB4 0WS, UK, United Kingdom; 4Department of Chemical Engineering and Biotechnology, University of Cambridge, CB2 3RA, UK, United Kingdom; 5Oystar Manesty, Merseyside L34 9JS, UK, United Kingdom
		Near-infrared (NIR) spectroscopy needs a calibration model for analysis of tablet coating thickness. In this work, we demonstrate that Terahertz Pulsed Imaging can provide, in a nondestructive fashion, such coating thickness information for building the calibration model needed by the NIR technique.
Tu-D1.3	11:45	Continuous-wave Terahertz Spectroscopic Imaging at over 1 THz for Pharmaceutical Applications
		K. Ajito1; H.J. Song1; A. Hirata1; A. Wakatsuki1; Y. Muramoto2; N. Shigekawa2; T. Kumashiro3; D. Asa3; T. Nagatsuma3; N. Kukutsu1; Y. Kado1 1NTT Microsystem Integration Labs., Japan; 2NTT Photonics Labs., Japan; 3Osaka Univ., Japan
		Spectroscopic images were obtained using a system combining a tunable continuous-wave terahertz laser with an InP Schottky barrier diode detector integrating a broadband log-periodic antenna. The distribution of polymorphic forms in pharmaceutical tablets was observed in images at over 1 THz.
Tu-D1.4	12:00	An analytical study of water concentration measurement in tissues with THz-wave
		Y.Y. Wang; H. Minamide; T. Ikari; M. Tang; T. Notake; H. Ito Riken, Japan
		THz wave is a viable tool for water content measurement due to its highly sensitivity to water. We analyzed the measurement errors of this method. The chosen basis for sample thickness and measuring frequency were presented. Measurements of water mapping were experimentally verified using TPO source
Tu-D1.5	12:15	Terahertz Pulse Imaging of Human Lymph Nodes
		M. Lim1; E. Jung1; H. Choi2; H. Han1 1POSTECH, Korea, Republic of; 2Asan Medical Center, University of Ulsan, Korea, Republic of
		We present terahertz pulse imaging of human lymph nodes. By analyzing the reflected terahertz pulses from paraffin embedded lymph nodes, we have successfully demonstrated significant imaging contrast between metastatic and normal lymph nodes.

	11:00 - 12:30	Gyrotrons 2	Room 7
		Chair: M. Thumm

Tu-E1.1	11:00	Recent Results of Development in Russia of 170 GHz Gyrotron for ITER
		Alexander Litvak Institute of Applied Physics of RAS, Russian Federation
		The industrial production prototype of the ITER gyrotron was tested at the new test stand in Kurchatov institute with power 1.02 MW in 200 second pulses, and 0.65MW in 800 second pulses. simultaneously at IAP a short pulse gyrotron with an increased size cavity was tested at power 1.5-2 MW.
Tu-E1.2	11:30	Recent Results with the European 2 MW Coaxial-Cavity Pre-Prototype Gyrotron for ITER
		T. Rzesnicki; B. Piosczyk; A.R. Choudhury; S. Illy; J. Jin; S. Kern; A. Samartsev; A. Schlaich; M. Thumm Karlsruhe Institute of Technology, Germany
		A 2 MW, CW, 170 GHz coaxial-cavity gyrotron for ITER is under development within the European Gyrotron Consortium. A short pulse tube is used for verification of critical components, as electron gun, beam tunnel, cavity and quasi-optical system. The paper gives an update on recent activities.
Tu-E1.3	11:45	To the Theory of High-power Gyrotrons with Uptapered Resonators
		Olgerts Dumbrajs1; G.S. Nusinovich2 1Institute of Solid State Physics, University of Latvia, Latvia; 2University of Maryland, United States
		The effect of a slight uptapering of the resonator wall on the efficiency enhancement and the purity of the radiation spectrum in the process of the gyrotron start-up and power modulation are studied for a typical high-power 170 GHz gyrotron which is currently under development in Europe for ITER.
Tu-E1.4	12:00	Multi-Frequency ECRH at ASDEX Upgrade, Status and Plans
		Dietmar Wagner1; J. Stober1; F. Leuterer1; F. Monaco1; M. Münich1; D. Schmid-Lorch1; H. Schütz1; H. Zohm1; M. Thumm2; T. Scherer2; A. Meier2; G. Gantenbein2; J. Flamm2; W. Kasparek3; H. Höhnle3; C. Lechte3; A.G. Litvak4; G.G. Denisov4; A. Chirkov4; L.G. Popov5; V.O. Nichiporenko5; V.E. Myasnikov5; E.M. Tai5; E.A. Solyanova5; V.E. Malygin5 1IPP Garching, Germany; 2KIT Karlsruhe, Germany; 3IPF Stuttgart, Germany; 4IAP Nizhny Novgorod, Russian Federation; 5GYCOM, Russian Federation
		The multi-frequency ECRH system at the ASDEX Upgrade tokamak employs depressed collector gyrotrons, step-tunable in the range 105-140 GHz. The system contains fast steerable launchers for remote steering of the beam during plasma discharges. The polarization can be controlled in feed-forward mode.
Tu-E1.5	12:15	Collector Design Studies for a 1 MW Cylindrical-Cavity and a 4 MW Coaxial-Cavity Gyrotron
		S. Illy1; M. Beringer1; S. Kern1; M. Thumm2 1Karlsruhe Institute of Technology (KIT) / IHM, Germany; 2Karlsruhe Institute of Technology (KIT) / IHM, IHE, Germany
		In this paper we will present design studies for the collectors and collector sweeping systems of two different high power CW gyrotrons: a) The 1 MW 170 GHz cylindrical-cavity gyrotron for ITER, b) A 4 MW 170 GHz coaxial-cavity gyrotron which at present is in the state of a design study.
Tu-E1.6	12:30	Development of high power gyrotron for ITER application
		Keishi Sakamoto1; K. Kajiwara1; K. Takahashi1; Y. Oda1; A. Kasugai1; T. Kobayashi1; N. Kobayashi1; M. Henderson2; C. Darbos2 1Japan Atomic Energy Agency, Japan; 2ITER Organization, France
		Recent progress of 170GHz gyrotron development is presented. Demonstration of 800kW/600s repetitive operation, 5kHz power modulation at 1MW for 60s are presented. And a dual frequency gyrotron was fabricated and tested which operated at 170GHz and 137GHz.

	11:00 - 12:30	Synchrotron Radiation Sources	Room 11
		Chair: U. Shade

Tu-F1.1	11:00	Coherent Synchrotron Terahertz Radiation Using Electron Bunch Slicing
		I. Katayama1; H. Shimosato2; M. Bito2; K. Furusawa2; M. Adachi3; M. Shimada4; H. Zen3; S. Kimura3; N. Yamamoto5; M. Hosaka5; M. Katoh3; M. Ashida6 1Yokohama National University, Japan; 2Osaka University, Japan; 3Institute of Molecular Science, Japan; 4KEK, Japan; 5Nagoya University, Japan; 6Osaka University, PRESTO JST, Japan
		Coherent and strong terahertz wave is generated from a synchrotron storage ring using laser bunch slicing. The electric field is detected with the electro-optic sampling method using a Ti:sapphire oscillator for probe and a 24-m long large mode-area photonic crystal fiber for delivering it
Tu-F1.2	11:30	Production of high power terahertz radiation through the SPARC Free-Electron Laser
		Stefano Lupi Department of Physics, University of Rome La Sapienza, Italy
		We present the TERASPARC project at the SPARC Free-Electron Laser. Sub-picosecond, nearly 100 microJ energy terahertz pulses extended until 5 THz are produced using a coherent transition radiation source. We discuss the possibility to produce exotic pulse shape and planned pump-probe experiment.
Tu-F1.3	11:45	LINAC Based Coherent fs-THz Source at PAL
		Jaehun Park1; J. Lee2; H. Kang1; C. Kim1; S. Jung1; T. Joo2 1Pohang Accelerator Laboratory, Korea, Republic of; 2Pohang University of Science and Technology, Korea, Republic of
		The fs-THz beamline at PAL can supply ultrafast and intense fs-THz radiation from 75 MeV linac. The radiation covers up to 3 THz and the pulse width is less than 200 fs. This intense THz source has a great potential for new THz science.
Tu-F1.4	12:00	The AILES Beamline for THz and IR spectroscopy
		P. Roy1; J.B. Brubach1; L. Manceron2; M. Rouzieres1; O. Pirali3; G. Creff1; W. Peng1; F. Kwabia-Tchana4 1Synchrotron-soleil, France; 2LADIR, U. P. & M. Curie – CNRS, France; 3LPPM, Orsay, France; 4LISA-U. Paris XII- Créteil, France
		The new infrared beamline (AILES) exploits infrared and THz synchrotron radiation from both edge emission and the constant field conventional source. The performances and the main research themes and future developments will be presented.
Tu-F1.5	12:15	Cerenkov Radiation from Plasmonic Metamaterials
		G.S. Park; J.K. So Center for THz-Bio Application Systems, Department of Physics and Astronomy, Korea, Republic of
		We explore the capability of various plasmonic metamaterials to generate Cerenkov radiation in the THz frequency range. The resulting Cerenkov radiation confirms the effective medium description of the considered metamaterials.

	14:00 - 15:30	Detectors 2	Aula Magna
		Chair: M.F. Kimmitt

Tu-A2.1	14:00	Perspectives in the Design of Monolithic Focal Plane Arrays for Terahertz Active Spectroscopic Imaging
		Michele Ortolani1; E. Giovine1; A. Di Gaspare1; S. Cibella1; R. Leoni1; G. Torrioli1; F. Evangelisti1; V. Foglietti1; M.S. Vitiello1; G. Scamarcio1; A. Cetronio2; C. Lanzieri2; M. Peroni2; A. Doria3; E. Giovenale3; A. Petralia3; G.P. Gallerano3 1CNR-IFN, Italy; 2SELEX S.I., Italy; 3ENEA Frascati, Italy
		Active spectroscopic imaging is based on arrays of broadband, short-response-time detectors observing a scene illuminated by a number of THz sources. We present system design, fabrication process and single-pixel test for 3 detector technologies: GaAs Schottky diodes, GaN transistors, Nb bolometers
Tu-A2.3	14:45	Thin-Film Antennas for Terahertz Radiation Detectors
		Y. Yasuoka; T. Uchida National Defense Academy, Japan
		Receiving properties of thin-film antennas for antenna-coupled terahertz radiation detectors, especially receiving properties of thin-film slot antennas are discussed comparing the antenna theory and the data obtained at the frequencies of 5 GHz, 94 GHz, 700 GHz, 2.5 THz and 28 THz.
Tu-A2.4	15:00	Plasmonic terahertz detectors/spectrometers
		Viacheslav Muravev; I.V. Kukushkin Terasense Development Labs, Russian Federation
		A miniature high speed THz and GHz electromagnetic radiation detector/spectrometer has been created. The operation principle is based on the excitation of distinct sets of plasma modes in the two-dimensional electron system of semiconductor heterostructure with embedded nonlinear defect.
Tu-A2.5	15:15	Design and optimization of Microwave Kinetic Inductance Detectors
		M. Calvo1; C. Giordano2; A. Cruciani1; P. De Bernardis1 1Università di Roma La Sapienza, Italy; 2Fondazione Bruno Kessler, Trento, Italy
		We describe the design, optimization and optical tests of Microwave Kinetic Inductance Detectors for the mm and sub-mm wavelengths. Our detectors are based on a novel resonator design, and can be easily tuned to suit the different experimental needs by choosing the correct geometry.

	14:00 - 15:30	Guiding Devices 1 & Thz Radiation Properties	Aula Minor
		Chair: A. Doria

Tu-B2.1	14:00	Squeezing THz waves below /250 using plasmonic parallel-plate waveguides
		H. Zhan; R. Mendis; D.M. Mittleman Rice University, United States
		By tapering the width and the plate separation of a parallel-plate waveguide, we experimentally demonstrate THz confinement down to a spot-size of 10 µm (~λ/260) by 18 µm (~λ//145), corresponding to a mode area of 2.6×10-5 λ2
Tu-B2.2	14:30	Return Loss Measurement of a Microfabricated Slow-Wave Structure for Backward-Wave Oscillation
		Chan-Wook Baik1; S.Y. Jun2; H.Y. Ahn1; S. Hong1; J.H. Lee1; S.G. Yu2; J.M. Kim1 1Samsung Advanced Institute of Technology, Korea, Republic of; 2Department of Physics, Hankuk University of Foreign Studies, Korea, Republic of
		A RF return loss was measured for a microfabricated W-band slow-wave structure. A deep reactive ion etching showed a good sidewall but inaccurately curved bottom surface. The result represents the etch rate was strongly dependent on the mask-opening area, which caused a frequency shift of about 5%.
Tu-B2.3	14:45	Extension of Thompson Scattering Concept to Terahertz Region
		Dariush Sardari Islamic Azad University, Iran
		Thomson scattering is a phenomenon taking place for low energy X and gamma ray photons. Using existing data on terahertz reflection coefficient, it is shown that Thompson scattering is a plausible explanation for terahertz reflection from surfaces.
Tu-B2.4	15:00	Ag/PS hollow cylindrical waveguides for transmission of THz pulses
		Oleg Mitrofanov1; T.K. Mavrogordatos2; R. James1; F.A. Fernandez1; J.A. Harrington3 1University College London, United Kingdom; 2Cambridge University, United Kingdom; 3Rutgers University, United States
		Dielectric-lined silver waveguides provide a solution for guiding THz pulses which exhibits low losses, excellent mode quality and low dispersion. To understand the waveguide characteristics modal dispersion is analyzed using THz near-field microscopy, time-domain spectroscopy and numerical modeling
Tu-B2.5	15:15	High refractive index titania-doped polymers for THz hollow Bragg fibers: how absorption losses limit the index contrast
		B. Ung1; A. Dupuis2; M. Skorobogatiy1 1Ecole Polytechnique de Montreal, Canada; 2Ecole Polytechnique, Canada
		The bandgaps of Bragg fibers are tuned by the refractive index contrast and thicknesses of the multilayer dielectric reflector. We demonstrate that the design of reflectors based on composite polymers depends on finding a compromise between the increase in index contrast and the accompanying losses.

	14:00 - 15:30	Laser Driven Sources 1	Room 2
		Chair: D. Abbott

Tu-C2.1	14:00	Mesa Structured Photoconductive Antennas for 1.5 µm: All-Fibre THz-TDS Spectroscopy Beyond 4 THz
		R.J.B. Dietz; H. Roehle; D. Stanze; V. Montanaro; H.J. Hensel; M. Schell; B. Sartorius Fraunhofer Heinrich-Hertz-Institut, Germany
		Photoconductive antennas based on InGaAs/InAlAs for operation at 1.5 µm are improved by employing special structuring techniques, i.e. mesa etching. The detected THz amplitude is increased by a factor of over 27. The spectra show a significantly increased bandwidth exceeding 4 THz.
Tu-C2.2	14:30	THz Wave Generation Inside a Fiber Laser Pumped High-Finesse Ring-Cavity OPO
		Walter Hurlbut1; V.G.K. Kozlov1; K.L.V. Vodopyanov2 1Microtech Instruments, United States; 2Stanford University, United States
		We produce tunable (1.3-3 THz) narrow-band THz waves using a fiber-laser pumped near-degenerate type 0 PPLN OPO. Over 130 µW of narrowband THz waves were generated at 1.5 THz in a periodically-inverted gallium arsenide sample using intracavity difference frequency generation.
Tu-C2.3	14:45	Experimental and theoretical study of photoconductive short electrical pulses generation at high repetition rate
		J.L. Coutaz; J.F. Roux IMEP-LAHC, Universite de Savoie, France
		We have studied the generation of ps electrical pulses at high repetition rate using photoconductive antenna. Experimentation and simulation show that screening of the biasing electrical field occurs much after the trapping time scale of the free carriers leading to a strong decrease of the signal.
Tu-C2.4	15:00	Enhanced Terahertz Emission from Metaatom-Loaded Photoconductive Antennas
		K. Takano1; T. Kawabata1; K. Murata2; K. Masuda3; F. Miyamaru4; M. Hangyo1 1Osaka University, Japan; 2AIST, Japan; 3SIJTechnology, Inc., Japan; 4Shinshu University, Japan
		Photoconductive antennas loaded with metaatoms have been fabricated by the super-fine ink-jet printing technology to control terahertz emission characteristics. The resonant enhancement has been observed at the LC resonant frequencies of the metaatom and it is analyzed by the FDTD simulation.
Tu-C2.5	15:15	Terahertz Wave Generation from GaP Waveguide Emitter Pumped by Compact Photonic Crystal Fiber Femtosecond Laser
		F. Liu1; Y.F. Li2; L. Chai2; Y.J. Song2; C.L. Wang1; M.L. Hu2; Q.R. Xing1; C.Y. Wang2 1Ultrafast Laser Lab.,Center for Terahertz Wave, Tianjin University, China; 2Ultrafast Laser Lab., Tianjin University, China
		We present a terahertz pulse train generated from rectangular GaP waveguide emitter pumped by a photonic crystal fiber (PCF) femtosecond laser system, and studied the effects of the pump pulse shape working on the terahertz conversion efficiency and the generated THz spectrum.

	14:00 - 15:30	Biology 2	Room 3
		Chair: A. Ramundo Orlando

Tu-D2.1	14:00	Molecular Imaging with Terahertz Waves
		Joo-Hiuk Son University of Seoul, Korea, Republic of
		A novel terahertz molecular imaging technique using nanoparticle probes is discussed in terms of sensitivity, resolution, and quantification. The in-vivo diagnostic results of cancers are also presented as an example.
Tu-D2.2	14:30	Temperature and Hydration-Dependent THz Investigations on Proteins
		Martin Dressel; c. Stehle; W. Abuillan; B. Gompf Universitat Stuttgart, Germany
		The FIR absorption of proteins decreases with temperature and increases with hydration. The amount of water attached to the protein is calculated by a general sorption isotherm equation. Comparing with the measured absorption the specific dynamic of the hydration shell can be extracted.
Tu-D2.3	14:45	Hydration Dynamics of Proteins Probed by THz Spectroscopy
		B.P. Born; M. Heyden; M. Havenith Physikalische Chemie 2, Ruhr-Universitaet, Germany
		We applied THz spectroscopy to study water dynamics around proteins. Unexpectedly we found extended dynamical hydration up to 20 Å from protein surfaces. Moreover by kinetic THz absorption (KITA) spectroscopy we figured out that protein and water network dynamics are coupled during protein folding.
Tu-D2.4	15:00	Time Domain Terahertz Spectroscopy for investigating the dielectric relaxation dynamics of water in model membranes
		Domenico Paparo1; K.J. Tielrooij2; L. Piatkowski2; H.J. Bakker2; M. Bonn2 1CNR-SPIN, Italy; 2FOM-AMOLF, Netherlands
		We have investigated hydrated model membranes, formed by stacked bilayers of unsaturated lipids, by means of terahertz time-domain and infrared spectroscopy. When the membrane hydration level is decreased the appearance of new types of water dynamics is observed due to the lipid-water interactions.
Tu-D2.5	15:15	Study on hydrogen bonding patterns in biological molecules by reaction induced far infrared spectroscopy
		Petra Hellwig1; Y. El Khoury2; A. Trivella2; R. Hielscher2 1Université de Strasbourg, Institut de Chimie, France; 2University of Strasbourg, France
		The use of the far IR spectral range presents a novel approach for analysis of proteins. Here it is presented for the analysis of Fe–S vibrations (500–200 cm-1) and of the intra- and intermolecular H-bonding signature (300–50 cm-1) in Rieske proteins and lipids in function of T, redox state and pH.

	14:00 - 15:30	Microscopy	Room 7
		Chair: R. Lewis

Tu-E2.1	14:00	Chemical Imaging of -TAS using Terahertz Chemical Microscope
		Toshihiko Kiwa1; Y.M. Yuji Minami1; Y.K. Yusuke Kondo1; Y.H. Yohei Hashimoto1; I.K. Iwao Kawayama2; M.T. Masayoshi Tonouchi2; K.T. Keiji Tsukada1 1Graduate School of Natural Science & Technology, Okayama University, Japan; 2Institute of Laser Engineering, Osaka University, Japan
		A terahertz chemical microscope (TCM) has been carried out to visualize the chemical potential distribution in µ-TAS. The µ-TAS was fabricated on the sensing chip and the distribution of chemical potential was successfully visualized using TCM.
Tu-E2.2	14:30	Pump and Probe THz Emission Microscope
		M. Tonouchi; S. Fujiwara; D. Kaneko; I. Kawayama; H. Murakami Osaka University, Japan
		Pump and probe THz emission microscope has been developed with a special resolution of less than 1 µm, and applied for the study of dynamic response of photoconductive antennas made of SI- GaAs, LT- GaAs, and Fe-InP.
Tu-E2.3	14:45	Influence of the Dielectric Substrate on the Terahertz Electric Near-Field of a Hole in a Metal
		Aurele Adam1; L. Guestin1; P.C.M. Planken2 1Technical University of Delft, Netherlands; 2technical University of Delft, Netherlands
		We have studied theoretically and experimentally the influence of a dielectric substrate on the frequency-dependent terahertz electric near-field of a small hole in a metal layer. The thickness of the metal layers dramatically influences this result.
Tu-E2.4	15:00	Scattering near-field microscopy in the THz region using a free-electron laser
		H.G.R. von Ribbeck1; M.T.W. Wenzel1; R.J. Rainer Jacob2; L.M.E. Eng1 1Institut für Angewandte Photophysik, Technische Universität Dresden, Germany, Germany; 2Institut für Ionenstrahlphysik und Materialforschung, FZ Dresden-Rossendorf, Germany
		We present scattering-type scanning near-field optical micro-spectroscopy (s-SNOM) investigations operated in the THz range with a wavelength independent spatial resolution of <150 nm. As a variable and monochromatic radiation source we use the free-electron laser (FELBE) at Dresden-Rossendorf.
Tu-E2.5	15:15	Image contrast of THz near-field microscope
		K. Moon; E. Jung; M. Lim; H. Han POSTECH, Korea, Republic of
		We present an apertureless THz pulse near field microscopy (THz-NFM) system. Approach curves are obtained for Au films and float-zone Si wafers, and are analyzed by using self-consistent image method (SCIM).

	14:00 - 15:30	Vacuum Electron Devices	Room 11
		Chair: N. Luhmann

Tu-F2.1	14:00	Design and Fabrication of Terahertz Extended Interaction Klystrons
		Richard Dobbs1; A. Roitman1; P. Horoyski1; M. Hyttinen1; D. Sweeney1; B. Steer1; K. Nguyen2; E. Wright2; D. Chernin3; A. Burke3; J. Calame4; B. Levush4; N.S. Barker5; J. Booske6; M. Blank7 1Communications & Power Indutries Canada, Canada; 2Beam-Wave Research, United States; 3Science Applications International Corp, United States; 4Naval Research Laboratory, United States; 5University of Virginia, United States; 6University of Wisconsin, United States; 7Communications & Power Industries, United States
		The development of new terahertz power amplifiers at 0.67, 0.85 and 1.03 THz presents significant challenges in both design and fabrication. This paper describes the design challenges and methodology and an outline design of the new device and an analysis of fabrication techniques considered.
Tu-F2.2	14:30	High Current Density, Reservoir Cathodes for High Frequency Applications
		R. Lawrence Ives1; L.R. Falce2; G. Collins1; D. Marsden1; G. Miram1; S. Schwartzkopf3; B. Smith3 1Calabazas Creek Research, Inc., United States; 2Consultant, United States; 3Ron Witherspoon, Inc., United States
		Sintered tungsten wire, reservoir cathodes offer high current density operation with very long life time. The diffusion rate can be selected consistent with the current emission density. This presentation will describe the impact of this technology, and present the latest test results.
Tu-F2.3	14:45	Modeling of the G-band Extended Interaction Klystron Using the Large-signal Code TESLA
		Igor Chernyavskiy1; A.N. Vlasov2; T.M. Antonsen3; D. Chernin1; B. Levush2; M. Hyttinen4; A. Roitman4; P. Horoyski4; R. Dobbs4; D. Berry4 1SAIC, United States; 2Naval Research Laboratory, United States; 3University of Maryland, United States; 4CPI, Canada
		Large-signal modeling of the 220 GHz Extended Interaction Klystron (EIK) were performed by using the klystron code TESLA. The results of TESLA simulations are discussed and compared with the known experimental data.
Tu-F2.4	15:00	Numerical and Experimental Investigation of a 35 GHz 20-Vane Spatial-Harmonic Magnetron
		J.I. Kim1; S.G. Jeon1; G.J. Kim1; J.H. Kim1; V.D. Yeryomka2; A.S. Tishchenko2; V.D. Naumenko3 1Korea Electrotechnology Research Institute, Korea, Republic of; 2Institute of Radio Physics and Electronics, Ukraine; 3Institute of Radio Astronomy, Ukraine
		A 35 GHz 3 kW spatial-harmonic magnetron employing 20-vane resonator is numerically and experimentally investigated. Simulated output power is 3.2 kW at beam voltage of 6.5 kV and anode current of 4 A using 3D PIC simulation. The measured resonant frequency for operation mode of p = 16 is 34.96 GHz.
Tu-F2.5	15:15	Surface field cavity based on a two-dimensional cylindrical lattice
		Alan Phelps1; I.V. Konoplev1; L. Fisher1; A.W. Cross1; K. Ronald1; C.W. Robertson1; M. Thumm2 1University of Strathclyde, United Kingdom; 2Karlsruhe Institute of Technology, Germany
		A Ka-band cavity based on a two-dimensional periodic lattice is studied. The apparatus designed to excite the cavity is discussed. Coupling between the surface and volume fields is demonstrated and pulse propagation through the cavity is investigated. The measurements agree well with simulations.

	16:00 - 17:45	Materials 3	Aula Magna
		Chair: M. Tonouchi

Tu-A3.1	16:00	Time-resolved terahertz spectroscopy of black silicon
		H.P. Porte1; D. Turchinovich1; S. Persheyev2; Y. Fan2; M.J. Rose2; P.U. Jepsen1 1DTU Fotonik - Department of Photonics Engineering, Technical University of Denmark, Denmark; 2School of Engineering, Physics and Mathematics, University of Dundee, United Kingdom
		The ultrafast photoconductivity dynamics of black silicon is measured by time-resolved terahertz spectroscopy. We show that the maximum photoconductivity as well as the decay time of the photoconductivity depends on the annealing method and fluence used in the production process.
Tu-A3.2	16:30	Material parameter extraction in THz-TDS using a converging beam transfer function
		A.L. Chung1; Z. Mihoubi1; G.J. Daniell1; A.H. Quarterman1; K.G. Wilcox1; H.E. Beere2; D.A. Ritchie2; A.C. Tropper1; V. Apostolopoulos1 1University of Southampton, United Kingdom; 2University of Cambridge, United Kingdom
		We demonstrate a parameter extraction algorithm based on a theoretical transfer function which takes into account a converging THz beam. Using this we successfully extract material parameters from data obtained for a quartz sample with a THz time domain spectrometer.
Tu-A3.3	16:45	Higher Order Conformation of Poly(3-hydroxyalkanoate)s Studied by Terahertz Time-Domain Spectroscopy
		Hiromichi Hoshina1; Y. Morisawa2; H. Sato2; Y. Ozaki2; C. Otani1 1RIKEN Advanced Science Institute, Japan; 2Kwansei Gakuin University, Japan
		Terahertz absorption spectra of Poly(3- hydroxybutyrate)s were measured. The orientation of the transition dipole moment was investigated by the polarization spectra. The temperature dependence of the spectra reflects the change in the hydrogen bonding distance of the crystalline structure.
Tu-A3.4	17:00	Effectiveness of microwave electromagnetic shielding in carbon based epoxy nanocomposites
		Stefano Bellucci1; L. Coderoni1; F. Micciulla1; G. Rinaldi2; I. Sacco1; A. Paddubskaya3; D. Bychanok3; A. Plushch3; P. Kuzhir3; S. Maksimenko3; M. Shuba3; S. Slepyan3; J. Macutkevic4; D. Seliuta4; G. Valusis4; J. Banys5 1INFN-LNF, Italy; 2University of Rome “Sapienza”, Italy; 3Belarusian State University, Belarus; 4Semiconductor Physics Institute, Lithuania; 5University of Vilnius, Lithuania
		We report on the comparative study of the effectiveness of electromagnetic shielding provided by different forms of nanocarbon dispersed in resin.
Tu-A3.5	17:15	Photon Helicity Driven Electric Currents in Graphene
		Sergey Ganichev1; J. Karch1; P. Olbrich1; M. Schmalzbauer1; C. Zoth1; C. Brinsteiner1; U. Wurstbauer1; M.M. Glazov2; S.A. Tarasenko2; D. Weiss1; J. Eroms1; R. Yakimova3; S. Lara-Avila3; S. Kubatkin4; E.L. Ivchenko2 1Terahertz Center, Germany; 2Ioffe Physical-Techanical Institute, Russian Federation; 3Linkoeping University, Sweden; 4Chalmers University of Technology, Sweden
		We observed photon helicity driven currents in graphene. Illuminating unbiased monolayer graphene samples with THz laser radiation at room temperature under oblique and normal incidence causes directed electric currents. This includes currents, which are solely driven by the light's helicity.
Tu-A3.6	17:30	Dielectric RF properties of CVD diamond disks from sub-mm wave to THz frequencies
		T.A. Scherer; A. Scheuring; P. Probst; A. Stockhausen; K. Illin; M. Prof. Dr. Siegel; A. Meier; D. Strauss KIT Karlsruhe, Germany
		ITER torus windows with CVD diamond disks for high power heating applications (170 GHz, 1-2 MW) are being investigated by different low- and high power measurement setups in the frequency range of 90 to 170 GHz.

	16:00 - 17:45	Near Field Devices 1	Aula Minor
		Chair: J.L. Coutaz

Tu-B3.1	16:00	Terahertz near-field imaging using a Y splitter and Sommerfeld wire waves on bare metal rods
		J.P. Guillet1; L. Chusseau1; R. Adam1; T. Laurent1; T. Grosjean2; A. Penarier2; D. Charraut2 1Institut d'Électronique du Sud, France; 2FEMTO-ST, France
		We describe a near-field experiment using a Y splitter supporting cw THz Sommerfeld wire modes coupled and decoupled with differential phase plates. Owing to a taper up to ~50 µm of one of the Y ends, a near-field imaging resolution of ~90 µm is demonstrated in agreement with calculations.
Tu-B3.2	16:30	Resonance frequency shifts of rectangular holes on finite dielectric substrates
		H.R. Park1; S.M. Koo1; O.K. Suwal2; Y.M. Park1; J.S. Kyoung1; M.A. Seo1; S.S. Choi2; N.K. Park1; D.S. Kim1; K.J. Ahn1 1Seoul National University, Korea, Republic of; 2Sun Moon University, Korea, Republic of
		We observe that rectangular holes fabricated in a gold film with a sub-skindepth thickness show blue-shifted resonance frequencies as the width increases. Moreover, for rectangular holes on a finite substrate its thickness and the hole width are crucial factors determining the resonance frequency.
Tu-B3.3	16:45	Frequency Selective Surfaces (FSS) and Metal Mesh Filters for THz Applications
		Carole Tucker; P.A.R. Ade Cardiff University, United Kingdom
		FSSs have been used for over 30 years to make filters in the far infrared and submm region, which can have low-, high- and band-pass properties. We present the current state of the art with respect to these quasi-optical components in the form of spectral data for fully realized, operational devices
Tu-B3.4	17:00	Metal-mesh broadband anti-reflection coatings in the THz frequencies.
		Jin Zhang1; P.A.R. Ade1; P.D.M. Mauskopf1; G. Savini2 1Cardiff University, United Kingdom; 2University College London, United Kingdom
		We have recently designed, built and measured an alternative to the use of classical dielectric material in anti-reflection coatings. A metal-mesh pattern has been designed to cover a frequency band greater than 90%. We discuss measurements and illustrate the extension for bi-refringent materials.
Tu-B3.5	17:15	Study of Optically Controlled Active Frequency Selective Surfaces with Organic Semiconductor
		H. Su; X. Liu; D. Li; X. Chen; R.S. Donnan; C.G. Parini; T. Kerouzis Queen Mary, University of London, United Kingdom
		Active Freuqency Selective Surfaces having tunable or reconfigurable frequency response received more and more attention. In this study, a new means of active FSS is reported. By printing the unit elements of FSS on an organic semiconductor, the optically controlled frequency response is achieved.
Tu-B3.6	17:30	Design of Terahertz Tunable Filter Using Subwavelength Metallic Slit Arrays
		Sanaz Zarei University of Michigan, United States
		A high quality tunable filter at terahertz frequencies has been designed using subwavelength metallic slit arrays. The bandpass center frequency is tunable over the range of 0.592THz to 0.994THz. Tunning is achieved by relative vertical movement of the subwavelength metallic slit layers.

	16:00 - 17:45	Laser Driven Sources 2	Room 2
		Chair: J. Alton

Tu-C3.1	16:00	Wide frequency range high resolution THz spectroscopy with using continuous-wave GaP THz Signal Generator and its application to defect detection
		Tetsuo Sasaki1; J.-.i. Nishizawa1; T. Tanabe2 1Sophia University, Japan; 2Tohoku University, Japan
		We developed automatic scanning GaP continuous wave THz Signal Generator and Spectrometer. The features of the spectrometer are higher resolution, higher measurement speed, smaller size, easier operation, etc. compared with the spectrometer using pulse-type THz Signal Generator as a light source.
Tu-C3.2	16:30	Mobile Source of 50 J Single-Cycle THz Pulses
		Andrey Stepanov1; S. Henin2; Y. Petit2; L. Bonacina2; J. Kasparian2; J.P. Wolf2 1Institute for Spectroscopy RAS, Russian Federation; 2GAP-Biophotonics, Universite de Geneve, Switzerland
		The Teramobile laser facility was used to realize the first mobile source of high-power THz pulses generated by tilted pulse front optical rectification. Starting from 695 fs, 120 mJ laser pulses, we obtained single-cycle 50 µJ pulses with an average frequency of 0.19 THz.
Tu-C3.3	17:00	THz Emission from a Femtosecond Laser Focus in a Bicolor Scheme in the Ionization-free Regime
		A.P. Shkurinov; A.V. Andreev; A.V. Borodin; M.N. Esaulkov; M.M. Nazarov; S.Y. Stremoukhov Department of Physics, M.V.Lomonosov Moscow State University, Russian Federation
		The interaction between high intensity ultrashort laser pulses and the atomic gas in the ionization-free regime leads to the emission of coherent, short pulse radiation at terahertz frequency. In this work we discuss a model for this effect and its experimental realization.
Tu-C3.4	17:15	Terahertz generation in locally plasma-activated silicon nanophotonic waveguides
		M. Nagel1; M. Wächter1; C. Matheisen1; M. Waldow1; T. Wahlbrink2; J. Bolten2; H. Kurz2 1RWTH Aachen University, Germany; 2AMO GmbH, Germany
		We present a novel approach for efficient terahertz signal generation at silicon nanophotonic waveguides via electro-optic difference frequency generation using telecom wavelengths excitation pulses. Second-order nonlinearity of silicon is achieved by plasma-activated surface modification.
Tu-C3.5	17:30	Generation of THz Radiation in a Laser Spark
		Evgeny Suvorov Institute of Applied Physicsa of Russian Academy of Sciences, Russian Federation
		A brief review of experimental and theoretical activity in IAP RAS on the generation of THz radiation in a laser spark produced by femtosecond optical pulses has been presented.

	16:00 - 17:45	Detectors 3	Room 3
		Chair: A. Hadni

Tu-D3.1	16:00	Terahertz Detection and Emission by Field Effect Transistors: influence of transistor geometry and high magnetic fields
		W. Knap1; D. Coquillat1; F. Teppe2; N. Dyakonova2 1GES, UMR5650, Universite Montpellier II, France; 2GES, UMR5650, Université Montpellier II, France
		We review the most important results concerning the physics and applications of FETs as Terahertz detectors and emitters [1, 2]. Particularly we stress recent results on THz detection and emission as a function of the FET’s geometry and external quantizing magnetic fields.
Tu-D3.6	16:30	A Wide-Band Wavelength-Tunable Terahertz Detector Using a Graphene Transistor
		Yukio Kawano; K. Ishibashi RIKEN, Advanced Device Laboratory, Japan
		We report on a novel type of wavelength-tunable terahertz (THz) detector based on a graphene transistor. We have demonstrated that the graphene under a magnetic field has the ability to detect THz waves in a wide range of 1.6-33THz. Further enhancement of the detection performance will be discussed.
Tu-D3.3	16:45	An integrated 520-600 GHz sub-harmonic mixer and tripler combination based on GaAs MMIC membrane planar Schottky diodes
		A. Maestrini1; B. Thomas2; C. Lee2; R. Lin2; S. Sin2; I. Mehdi2 1Observatoire de Paris, LERMA, France; 2NASA - Jet Propulsion Laboratory, United States
		We present the design, development and test of an integrated 560 GHz sub-harmonic mixer and a 280 GHz frequency tripler based on GaAs MMIC planar Schottky diodes in a single cavity. The mixer/tripler block has been fabricated using conventional metal and silicon micromachining. Tests are presented.
Tu-D3.4	17:00	AlGaN/GaN Heterostructure Transistors for the Generation and Detection of THz Radiation
		Ennio Giovine1; A. Di Gaspare2; M. Ortolani2; F. Evangelisti2; F. Foglietti2; A. Cetronio3; C. Lanzieri3; M. Peroni3; A. Doria4; E. Giovenale4; G.P. Gallerano5; I. Spassovsky6; D. Dominijanni7 1CNR- Istituto di Fotonica e Nanotecnologie, Italy; 2CNR - Istituto di Fotonica e Nanotecnologie, Rome, Italy; 3SELEX Sistemi Integrati, Italy; 4ENEA - Centro Ricerche Frascati, Italy; 5ENEA, Italy; 6ENEA- Centro Ricerche Frascati, Rome, Italy; 7CNR- Istituto di Fotonica e Nanotecnologie, Rome, Italy
		AlGaN/GaN heterostructure is an excellent candidate for sub-mm wave power amplifiers, which can serve as integrated power source for THz frequency multipliers. We discuss the operation of AlGaN/GaN transistors as THz detectors, which provides information on the electron systems at THz frequencies.
Tu-D3.5	17:15	Room Temperature Terahertz Detection in High-Electron-Mobility Transistor Structure using InAlAs/InGaAs/InP Material Systems
		A. El Moutaouakil1; T. Suemitsu1; T. Otsuji1; D. Coquillat2; W. Knap2 1Research Institute of Electrical Communication, Tohoku University, Japan; 2Groupe d’Etude des Semiconducteurs (GES), Montpellier 2 University, France
		We report on non-resonant terahertz detection using the rectification mechanism of the two-dimensional plasmons in InAlAs/InGaAs/InP high-electron-mobility transistors at 300K, demonstrating excellent sensitivity/noise performances of ~125 V/W and ~10-11 W/Hz0.5 for 0.30THz radiation.

	16:00 - 17:45	Gyrotrons 3	Room 7
		Chair: A. Phelps

Tu-E3.1	16:00	140 GHz, 1 MW CW Gyrotron Development for the ECH System of the Stellarator W7-X
		Gerd Gantenbein1; V. Erckmann2; S. Illy1; S. Kern1; W. Kasparek3; C. Lechte3; W. Leonhardt1; C. Lievin4; A. Samartsev1; A. Schlaich1; M. Schmid1; M. Thumm1 1Karlsruhe Institute of Technology (KIT), Association EURATOM-KIT, Germany; 2Max-Planck-Institut fuer Plasmaphysik, Teilinstitut Greifswald, Association EURATOM, Germany; 3Universitaet Stuttgart, Institut fuer Plasmaforschung, Germany; 4Thales Electron Devices, France
		A 10 MW, 140 GHz ECRH system is currently under construction for the stellarator W7-X. The RF power will be provided by 10 gyrotrons. A European collaboration has been established to develop and build the 10 gyrotrons each with an output power of 1 MW for continuous wave (CW) operation.
Tu-E3.2	16:30	Amplification of Picosecond Pulses in a 140 GHz Gyro-TWT
		Emilio Nanni; H.J. Kim; M.A. Shapiro; R.J. Temkin; P. Woskov Massachusetts Institute of Technology, United States
		We report amplification of pulses as short as 400 ps in a 1 kW, 140 GHz gyro-TWT. The pulses are broadened by group velocity dispersion and spectral narrowing due to finite gain bandwidth. To our knowledge, this is the first observation of picosecond pulse amplification in a vacuum electron device.
Tu-E3.3	17:00	Collector loading during high frequency power modulation
		Harald Braune1; V. Erckmann1; S. Illy2; H.P. Laqua1; G. Michel1; F. Noke1; F. Purps1 1Max-Planck-Institut für Plasmaphysik Greifswald, Germany; 2Karlsruher Institute of Technology (KIT), Germany
		The high frequency power modulation of cw gyrotrons with an output power up to 1MW is limited by collector loading. 2 power modulation schemes are applied and waste power remains which must be dissipated in the collector. Different sweep technologies have been developed in order to avoid overheating
Tu-E3.4	17:15	Numerical Simulation of Low-Frequency Collective Processes in Gyrotron Electron Beams
		O. Louksha St. Petersburg State Polytechnical University, Russian Federation
		We simulate collective processes in the electron space charge trapped between the cathode and the magnetic mirror in gyrotrons. The characteristics of parasitic low-frequency oscillations in the trap and their influence on the parameters of the electron beam entering the cavity are studied.
Tu-E3.5	17:30	Operational capabilities studies of the 140GHz/1MW/TE28,8 W7-X gyrotron operated at 126GHz/TE26,7 in view of the upgrade of the TCV EC-system
		Stefano Alberti; J.P. Hogge; I. Pagonakis; T.M. Tran; M.Q. Tran CRPP/EPFL, Switzerland
		A detailed study of the operational capabilities of the W7-X gyrotron operated at 126GHz/TE26,7 is presented. This study is associated with the foreseen upgrade of TCV in which it is planned to add to the present EC system 3MW of additional rf power bringing the total EC-power to 7.5MW.

	16:00 - 17:45	Ultra Fast Measurements	Room 11
		Chair: D. Mittleman

Tu-F3.1	16:00	Longitudinal Fields in Focused Radially Polarized Terahertz Beams
		Stephan Winnerl; R. Hubrich; F. Peter; H. Schneider; M. Helm FZ Dresden-Rossendorf, Germany
		We study the spatial and temporal structure of focused THz beams of radial polarization. Strong longitudinal field components localized at the axis of propagation are observed. The phase of the longitudinal field components is shifted by π/2 with respect to the transverse field components.
Tu-F3.2	16:30	Measurement of higher-order exciton resonances in GaAs quantum wells via shift-current-THz-spectroscopy at room temperature
		Shekhar Priyadarshi1; K. Pierz1; U. Siegner1; P. Dawson2; M. Bieler1 1Physikalisch-Technische Bundesanstalt, Germany; 2School of Physics and Astronomy, University of Manchester, United Kingdom
		We generate ultrafast photocurrents in GaAs quantum wells and measure the simultaneously emitted THz radiation. This THz spectroscopy allows for the detection of higher-order exciton resonances at room temperature. This method can be more sensitive than conventional photoluminescence experiments.
Tu-F3.3	16:45	Intraexciton terahertz nonlinear optics in semiconductor quantum wells: sideband generation and AC Stark splitting
		Manfred Helm1; M. Wagner1; H. Schneider1; D. Stehr1; S. Winnerl1; A.M. Andrews2; S. Schartner2; G. Strasser2 1Forschungszentrum Dresden-Rossendorf, Germany; 2TU Wien, Austria
		We investigate nonlinear optics related to the intra-excitonic 1s-2p heavy-hole transition in GaAs/AlGaAs quantum wells. Tuning intense terahertz (THz) light around this resonance we report (i) efficient second order sideband generation and (ii) first clear evidence of the Autler-Townes effect.
Tu-F3.4	17:00	Pulsed cyclotron resonance measurements with a rapid-scanning, fiber-coupled THz TDS system
		D. Molter1; S. Georges2; M. Goiran2; F. Keilmann3; R. Beigang1; J. Leotin4 1Fraunhofer Institute for Physical Measurement Techniques IPM, Germany; 2Laboratoire National des Champs MAgnetiques Intenses, France; 3Max Plank Institute of Quantum Optics, Germany; 4Laboratoire National des Champs Magnetiques Intenses, France
		We present time-resolved cyclotron resonance spectra of holes in p-germanium measured during a single magnetic field pulse by using a rapid-scanning, fiber-coupled THz time-domain spectroscopy system.
Tu-F3.5	17:15	Time-Resolved THz-Spectroscopy of InAs Nano-Wires
		S.S. Prabhu Tata Institute of Fundamental Research, India
		We study the emission mechanisms of THz radiation from InAs nanowires (NWs) using femtosecond infra-red (IR) pump beam and THz probe in a time-resolved reflection geometry setup at room temperature. We compare the spectra of InAs NWs with that of a p-InAs crystal which is standard THz emitter.
Tu-F3.6	17:30	Equivalent Circuit Analysis of a Planar Helix Slow-Wave Structure for Application in High Frequency Traveling-Wave Tubes
		S.K. Datta Microwave Tube Research & Development Centre, India
		A planar helix slow-wave structure was analyzed for its equivalent circuit parameters. For identical situations with respect to the structure parameters, the planar helix shows a greater promise for higher device efficiency over a wider frequency range than the circular helix.

	17:45 - 19:15	Tuesday Poster	Chiostro

Tu-P.01	17:45	Influence of Possible Reflections on the Operation of the European Cylindrical Cavity Gyrotron for ITER
		Olgerts Dumbrajs Institute of Solid State Physics, University of Latvia, Latvia
		Influence of reflections on operation of gyrotrons with radial output is studied both theoretically and experimentally. By way of example the European ITER cylindrical cavity gyrotron operating in the TE32,09 mode at frequency 170 GHz is considered.
Tu-P.02	17:45	Status of the EU 170 GHz/2 MW/CW Coaxial Cavity Gyrotron for ITER: The Dummy Gun Experiment
		I. Pagonakis1; S. Alberti1; S. Illy2; S. Kern2; C. Liévin3; B. Piosczyk2; J.-.P. Hogge1; Q.M.T. Tran, Q.M.1 1CRPP-EPFL, Switzerland; 2IHM-KIT, Germany; 3TED, France
		A mock-up gun has been manufactured exact replica of the refurbishment first prototype EU 170 GHz/2MW/CW coaxial cavity gyrotron, but without emitter ring, in order to validate the voltage standoff stability. The experimental results will be presented.
Tu-P.04	17:45	Progress of a Multi-Megawatt Gyrotron System for Electron Cyclotron Heating on the Large Helical Device
		Takashi Shimozuma1; S. Kubo1; Y. Yoshimura1; H. Igami1; H. Takahashi1; S. Kobayashi1; S. Ito1; Y. Mizumo1; K. Okada1; Y. Takita1; T. Mutoh1; H. Idei2; R. Minami3; T. Kariya3; T. Imai3 1National Institute for Fusion Science, Japan; 2Kyushu University, Japan; 3University of Tsukuba, Japan
		In LHD, an ECH system for fusion-relevant plasma heating has been greatly progressed with the development of megawatt gyrotrons. Net power of 3.7 MW could be injected into LHD. For stable operation, a new position and profile monitor of the mmw-beams in evacuated transmission lines is developed.
Tu-P.05	17:45	Multi-frequency Gyrotron for ASDEX Upgrade
		Vadim Myasnikov1; V.O. Nichiporenko1; L.G. Popov1; V.E. Myasnikov1; M.V. Agapova1; Y.N. Belov1; A.P. Gnedenkov1; V.N. Ilyin1; V.I. Irkhin1; I.V. Kazansky1; A.V. Kruglov1; V.G. Rukavishnikova1; N.A. Shamanova1; E.A. Soluyanova1; E.M. Tai1; S.V. Usachev1; A.G. Litvak2; A.V. Chirkov2; G.G. Denisov2; A.N. Kuftin2; V.I. Malygin2; V.E. Zapevalov2; H. Zohm3; J.K. Stober3; D.H. Wagner3; F. Leuterer3; F. Monaco3; M.J. Munich3; H. Schuetz3; V.E. Myasnikov4 1GYCOM, Russian Federation; 2IAP RAS, Russian Federation; 3IPP, Germany; 4GYCOM Ltd, Russian Federation
		Abstract — a multi-frequency gyrotron for modernization of ASDEX Upgrade ECRH system is under development in GYCOM/IAP by contract with IPP. The gyrotron must produce 10-s pulses with 1MW output power at 140GHz and over 800-kW power at 3 additional frequencies within 105-140GHz frequency range.
Tu-P.06	17:45	94 GHz, CW, Low-Voltage Gyrotron
		Xin-jian Niu Vacuum Electronics National Laboratory, Institute of High Energy Electronics,, China
		A gyrotron intended as a compact lightweight source has been designed. A output power of 34kW with continuous wave is obtained with cryogen-free superconducting magnet for the gyrotron, magnetic field 3.6T with operating frequency 94GHz, corresponding to an efficiency of 43% in advance
Tu-P.07	17:45	Radiation generation at 94 GHz with a pseudospark-sourced electron beam
		H. Yin1; D. Bowes1; A.W. Cross1; W. He1; K. Ronald1; A.D.R. Phelps1; D. Li2; J. Zhou2; X. Chen2 1University of Strathclyde, United Kingdom; 2Queen Mary, University of London, United Kingdom
		A small-scale pseudospark discharge is being investigated as the electron beam source for a klystron operating at 94GHz, and single-gap discharge experiments have been carried out. The klystron has been designed using the particle-in-cell (PiC) code MAGIC-2D with promising expected output.
Tu-P.08	17:45	Numerical Study of Pseudospark Discharge Based Electron Beam and Propagation for Terahertz Source Generation
		Daohui Li1; X. Chen1; H. Yin2; D. Bowes2; W. He2; A.W. Cross2; K. Ronald2; A.D.R. Phelps2 1Queen Mary University of London, United Kingdom; 2University of Strathclyde, United Kingdom
		To feed demand of high power and compact THz source, pseudospark discharge driven microklystron has been designed to generate THz radiation. Pseudospark discharge can provide high current density electron beam with tiny size. Numberical study has been utilised to investigate the detailed process.
Tu-P.09	17:45	Photo-electron gun generating sub-pico second bunch
		M.R. Asakawa1; S. Sone1; H. Yamamoto1; R. Sonomura1; S. Yamaguchi1; Y. Tsunawaki2 1Kansai University, Japan; 2Osaka Sangyo University, Japan
		A 50 kV photo-electron gun was developed to construct a powerful broad-band terahertz radiation source. A magnesium cathode was irradiated by a frequency tripled Ti:sapphire laser. Train of electron bunch of 50 pC was generated. The bunch produced the optical transition radiation at the beam dumper.
Tu-P.10	17:45	Status of the THz activities at the MLS
		Ralph Müller1; A. Hoehl1; A. Serdyukov1; G. Ulm1; J. Feikes2; M. Ries2; G. Wüstefeld2 1Physikalisch-Technische Bundesanstalt, Germany; 2Helmholtz-Zentrum Berlin, Germany
		We report the status of the MLS as a source of powerful, stable, and pulsed THz radiation. Additionally we show results from the commissioning of the experimental stations and first measurements in the THz spectral range.
Tu-P.11	17:45	Terahertz coherent synchrotron radiation at the synchrotron SOLEIL
		C. Evain; M.E. Couprie; A. Loulergue; L. Nadolski; M.A. Tordeux; J. Barros; L. Manceron; J.B. Brubach; G. Creff; P. Roy Synchrotron SOLEIL, France
		We present experimental and numerical results on Terahertz coherent synchrotron radiation obtained in the beamline AILES at the synchrotron SOLEIL. Depending on the storage ring configuration and on the electron bunch current we observed either stable or instable signals.
Tu-P.12	17:45	Bunch anomalies in SR-IR time domain emission
		Gian Luigi Zangari LNF-INFN Frascati, Italy
		SHT analysis shows a direct evidence of a delayed component in the SR-IR spectra of e+/e- bunches at DAΦNE and HLS (Hefei). To avoid a relativistic paradox, we are forced to discard the “Rigid Bunch Model” and allow higher degrees of freedom (internal modes and/or “super-motions”)
Tu-P.13	17:45	Frequency-Dependent Response of Two-Contact Photoconductive Antenna
		H. Dong1; Y.D. Gong1; X.L. Tian1; S.P. Thong2; R. Bhuvaneswari2; M. Olivo2 1Institute for Infocomm Research, Singapore; 2National Cancer Centre, Singapore
		A two-contact photoconductive antenna has been experimentally found to be frequency-dependent and respond to the mixture of both polarization components of terahertz radiation. This effect leads to wrong polarization state measurement results. It may also result in a fake ¡°absorption peak¡±.
Tu-P.14	17:45	Far infrared detection of pulsed lasers with AFM microcantilevers
		Jean-Michel Ortega1; F.G. glotin2; R.P. Prazeres1; A.D. Dazzi3 1CLIO/LCP/CNRS, France; 2Univ. Paris-Sud, France; 3Univ Paris-Sud, France
		We have used an AFM microcantilever as a far infrared detector. When hit by a pulsed laser, the cantilever starts damped oscillations which amplitude can be recorded and laser spectra can be recorded at λ > 25 µm which is the limit of 77K HCT detectors.
Tu-P.15	17:45	Characterization of SIS Array Mixers on Si Substrates at 350 GHz
		S. Andree; M. Justen; M. Schultz; C.E. Honingh; K. Jacobs; J. Stutzki Universität zu Köln, Germany
		We present performance measurements of Nb- Al2O3-Nb (SIS) mixers on Si-membranes for radio frequencies (280-380 GHz) with an IF band from 4 to 12 GHz. We use beamlead technology to mount the devices in waveguide mixerblocks. These mixers will be used in a 7 pixel focal plane array for astronomy.
Tu-P.16	17:45	A Modal Approach to the Modeling of Rectangular Detector Horns and Cavities at THz Frequencies
		Stephen Doherty; N. Trappe; C. O’Sullivan; J.A. Murphy NUI-Maynooth, Ireland
		Far-IR space telescopes use horn antenna coupled bolometers for achieving high levels of sensitivity. Unfortunately at THz frequencies large cavity coupled horns prove significantly challenging to simulate accurately. This paper will outline alternative simulation concepts for such problems.
Tu-P.17	17:45	A Thin-Film Spiral Antenna Coupled with Bi Microbolometer Operating at 100 GHz Band
		Son Le; T. Tachiki; T. Uchida; Y. Yasuoka National Defense Academy, Japan
		A thin-film 2-arm spiral antenna with Bi microbolometer operating at 100 GHz band was fabricated. In the video detection, detected voltages, which were proportional to the power of signal wave at 100 GHz and a bias current, were obtained. DC sensitivity of the microbolometer was about 35 W-1.
Tu-P.18	17:45	Efficient detection of THz pulses using low-temperature-grown GaAs photoconductive antennas excited at 1560 nm
		Y. Kadoya1; K. Kajikawa1; T. Kataoka1; J. Kitagawa1; Y. Takemura2 1Hiroshima University, Japan; 2Sumitomo Osaka Cement Co. Ltd., Japan
		Low-temperature-grown GaAs photoconductive antenna was investigated as the detector of THz pulses for 1560 nm excitation. A S/N value higher than 50 dB obtained with a standard measurement condition suggests that the antenna can be used as a detector in 1560 nm-based commercial time domain systems.
Tu-P.19	17:45	A 340 GHz 2SB Schottky Receiver for the STEAMR Limb Sounder
		Peter Sobis1; J. Stake2; A. Emrich1 1Omnisys Instruments AB, Sweden; 2Chalmers University of Technology, Sweden
		A low VSWR sideband separating receiver topology employing subharmonic Schottky diode mixers has been implemented at 340 GHz as an integrated module housing mixers, commercial LNA’s and waveguide hybrids. Image rejection levels of around 20 dB and a receiver SSB noise of 9000 K are measured.
Tu-P.20	17:45	Extremely Broadband Characterization of a Schottky Diode Based THz Detector
		Daniel Schoenherr1; C. Bleasdale2; T. Goebel1; C. Sydlo1; H.L. Hartnagel1; R. Lewis2; P. Meissner1 1Technische Universitaet Darmstadt, Germany; 2University of Wollongong, Australia
		A Schottky diode based module for direct detection of THz power provides fast measurement capabilities at room temperature. This paper presents the extremely broadband spectral characterization of a Schottky diode in comparison to a Golay cell in the frequency range from 0.1 THz up to 2 THz.
Tu-P.21	17:45	Microwave heterodyne receiver based on AlGaAs/GaAs 2DEG bolometer
		Kai Wang; R. Ramaswamy; M. Bell; A. Sergeev; G. Strasser; A. Verevkin; V. Mitin University at Buffalo, SUNY, United States
		A hot-electron bolometric mixer, which uses the nonlinearities of the heated 2DEG medium in AlGaAs/GaAs heterostructure, is fabricated and characterized.It's shown that such hot electron bolometer is promising for THz detection, when integrated with a Quantum Cascade Laser as the local oscillator.
Tu-P.22	17:45	Resonance detection of terahertz radiation in nanometer field-effect transistors with two-dimensional electron gas
		Kirill Maremyanin1; V.I. Gavrilenko1; S.V. Morozov1; D.M. Ermolaev2; V.E. Zemlyakov2; S.Y. Shapoval2; N.A. Maleev3; D.V. Fateev4; V.V. Popov4; F. Teppe5; W. Knap5 1Institute for Physics of Microstructures RAS, Russian Federation; 2Institute of Microelectronic Technology and Ultra-High-Purity Materials RAS, Russian Federation; 3Ioffe Physical-Technical Institute RAS, Russian Federation; 4Kotelnikov Institute of Radio Engineering and Electronics RAS, Russian Federation; 5Groupe d’Etude de Semiconducteurs, CNRS–Universite Montpellier 2, France
		Resonance detection of THz radiation by nanometer FETs GaAs/AlGaAs and transistor structure GaAs/InGaAs with large area slit-grating gate has been measured. For these transistors peaks in the resonance photoresponse curve are tunable with gate voltages in accordance with the Dyakonov–Shur theory.
Tu-P.23	17:45	Temperature dependence of dark current mechanisms in long-wavelength arsenic doped HgCdTe photovoltaic devices
		j. liang; w.d. hu; z.h. ye; x.s. chen; w. lu Shanghai Institute of Technical Physics,Chinese Academy Sciences, China
		A simultaneous-mode nonlinear resistance¨Cvoltage curve is applied in the analysis of dark current mechanisms in long-wavelength arsenic doped HgCdTe devices at various temperatures. Six characteristic parameters as function of temperature are extracted from measured current-voltage curves.
Tu-P.24	17:45	High differential gain single photon avalanche photodiode with improved structure
		W.J. Wang; L. Lin; T.X. Li; N. Li; W.D. Hu; W. Lu; X.S. Chen National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy o, China
		An InGaAs/InP single-photon avalanche photodiode (SPAD) with a high differential gain was achieved by changing the multiplication region thickness and the sheet charge density of the charge layer. A gain of more than 100 was obtained. The DCR is less than 1k with the frequency up to 250 kHz.
Tu-P.25	17:45	Field Effect Transistors For Fast Terahertz Detection and Imaging
		S. Boubanga Tombet RIEC TOHOKU UNVIVERSITY, Japan
		Recent results on THz detection by FETs are reported. THz Imaging with FET and detection in quantizing magnetic field. Results of THz Imaging show that FETs arrays are good candidate for real time imaging. In magnetic field we report an enhancement of signal at the cyclotron resonance condition.
Tu-P.26	17:45	Detection of high power THz radiation by GaAs High Electron Mobility and Si Field Effect Transistors
		C.J. Drexler1; N. Dyakonova2; M. Schafberger1; K. Karpierz3; J. Karch1; H. Videlier2; Y. Meziani4; P. Olbrich1; W. Knap5; S.D. Ganichev1 1Terahertz Center, University of Regensburg, Germany; 2GES, UMR5650 CNRS et Universite Montpellier 2, France; 3Institute of Experimental Physics, University of Warsaw, Poland; 4Departamento de Fisica Aplicada, Universidad de Salamanca, Spain; 5GES, UMR5650 CNRS et Universite Montpellier 2, Germany
		We report on the observation of photocurrents in GaAs High Electron Mobility and Si Field Effect Transistors . We show that illuminating the samples with high power terahertz laser radiation causes electric currents. These currents are driven by plasmonic effects in two dimensional electron gases.
Tu-P.27	17:45	Terahertz Detection by InGaAs HEMTs in Quantizing Magnetic Fields: relation between magnetoresistance and photovoltaic response
		Oleg klimenko1; Y.A. Mityagin2; H. Videlier1; S. Boubanga Tombet3; F. Teppe1; N.V. Dyakonova1; S.H. Nadar1; S.A. Savinov2; C. Consejo1; V.N. Murzin2; W. Knap1 1University Montpellier 2, France; 2P.N. Lebedev Physical Institute of RAS, Russian Federation; 3Tohoku University, Japan
		THz detection by plasma wave mechanism in InGaAs HEMTs is studied in high/quantizing magnetic fields regime. The correlation between the photovoltaic response and magnetoresistance is revealed. It allows to explain the nature of strong oscillations observed in the transistor Terahertz photoresponse.
Tu-P.28	17:45	Sub-Terahertz imaging with AlGaN/GaN MISFETs
		Dominique Coquillat1; S. Nadar1; O. Klimenko1; H. Videlier1; N. Dyakonova1; F. Teppe1; W. Knap1; K. Madjour2; G. Ducournau2; C. Gaquière2; M.A. Poisson3; J. Torres4; A. Dobroiu5; C. Otani5 1Groupe d'Etude des Semiconducteurs UMR5650, France; 2IEMN UMR8520 Villeneuve d'Ascq, France; 3Thales Research and Technology, Orsay, France; 4IES UMR5214 Montpellier, France; 5RIKEN Sendai Miyagi, Japan
		We evaluate the optical performance of AlGaN/GaN MISFETs as a non-resonant sub-terahertz, room temperature detector. The photoresponse and the noise equivalent power is determined and single-pixel, room temperature imaging demonstrated.
Tu-P.29	17:45	Terahertz responsivity enhancement of silicon CMOS transistor-based detectors using a current bias
		S. Boppel1; A. Lisauskas1; F. Voltolina2; P. Haring Bolívar2; H.G. Roskos1 1Physikalisches Institut, Johann Wolfgang Goethe-Universität Frankfurt, Germany; 2The Institute of High Frequency and Quantum Electronics, University of Siegen, Germany
		We report on a responsivity enhancement of silicon CMOS transistor-based detectors for terahertz radiation by the application of a source-to-drain bias current.
Tu-P.30	17:45	Localized THz detection in YBCO sensors patterned by heavy-ion lithography
		F. Laviano1; R. Gerbaldo1; G. Ghigo1; L. Gozzelino1; B. Minetti1; A. Rovelli2; E. Mezzetti1 1Politecnico di Torino and INFN-Sez.Torino, Italy; 2INFN, Laboratori Nazionali del Sud, Catania, Italy
		Measurements of the photoresponse of superconducting YBa2Cu3O7-x film devices to THz radiation are reported. The properties of the film were modulated in a functional way by High-Energy-Heavy-Ion lithography, an effective tool to locally enhance the response of the sensor to the infrared spectrum
Tu-P.31	17:45	Characterization of Carbon Deposits during Heterogeneous Catalysis using Terahertz Time-Domain Spectroscopy
		Axel Zeitler1; M.N. de-Silva1; C.T. McElroy1; J. McGregor1; A.P.E. York2; L.F. Gladden1 1University of Cambridge, United Kingdom; 2Johnson Matthey Technology centre, United Kingdom
		Terahertz spectroscopy was used to quantitatively assess the degree of graphitic order in the hydrocarbonaceous deposits formed during the reaction of n-butane over the catalyst ZSM-5.
Tu-P.33	17:45	The Photoresponse of Hg<0.722>Cd<0.278>Te Infrared Photodiodes with a Heavily Doped n Region
		X.S. Chen1; J. Wang2; W.D. Hu3; W. Lu3; F.Q. Xu2 1National Laboratory for Infrared Physics,Shanghai Institute of Technical Physics,Chinese Academy of, China; 2National Synchrotron Radiation Laboratory, University of Science and Technology of China, China; 3National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy o, China
		By taking into account the contributions: (i) the BM shift considering a non-parabolic conduction band, (ii) the BGN effect, and (iii) the Hg-vacancy-induced acceptor trap level, we have calculated the shift of the photoresponse between n and p regions of Hg<0.722>Cd<0.278>Te infrared photodiode.
Tu-P.34	17:45	Nondestructive detection of delaminations in plastic weld joints
		O. Peters1; S. Wietzke1; C. Jansen1; M. Scheller1; M. Koch2 1Universität Marburg, Universität Braunschweig, Germany; 2Universität Marburg, Germany
		Nondestructive evaluation has an increased interest in the plastic industry. One of the tasks is the detection of delaminations in plastic weld joints. We present a technique to find delaminations employing contact-free, terahertz spectroscopy and an algorithm employing a cascaded fourier transform.
Tu-P.35	17:45	Electric and magnetic dipole-dipole interaction of two plane split-ring resonators
		l.j. Huang1; y. Zeng2; x.s. Chen1; z.f. Li1; w. Lu1 1Shanghai Institute of Technical Physics, Chinese Academy of Sciences, China; 2Pennsylvania State University, United States
		Extinction cross section of two split-ring resonators is calculated by means of Finite-Difference-Time-Domain. The magnetic resonance of dimer shows blueshifts and redshifts with decreasing the distance between them. The finds can be interpreted in terms of electric and magnetic dipole interaction
Tu-P.36	17:45	Hybrid sol-gel materials with high transmittance in the THz region
		Paolo Prosposito1; L. Brigo2; G. Della Giustina2; A. Perucchi3; S. Lupi4; G. Brusatin2 1Università di Roma Tor Vergata, Italy; 2Università degli Studi di Padova, Italy; 3Sincrotrone Trieste S.C.p.A, Italy; 4Università di Roma La Sapienza, Italy
		We report on the transmission of hybrid organic-inorganic sol-gel materials in THz region. Their transmission is very good and comparable with the most transparent polymers. An attempt to explain the relationship between material compositional characteristics and their behaviour has been given.
Tu-P.37	17:45	Absorption Spectra of High Purity Metallic and Semiconducting Single-Walled Carbon Nanotube Thin Films in a Broad Frequency Region
		M. Ichida1; S. Saito2; T. Nakano1; H. Ando1; Y. Feng3; Y. Miyata4; K. Yanagi5; H. Kataura3; S. Ogawa1 1Konan University, Japan; 2National Institute for Information and Communications Technology, Japan; 3Advanced Industrial Science and Technology, Japan; 4Tokyo Metropolitan University, Japan; 5Nagoya University, Japan
		Absorption spectra of high purity metallic and semiconducting single-walled carbon nanotubes have been measured from THz to UV region. The broad absorption band around 100-1000 cm-1 of the metallic sample can correspond to the optical transition between small energy gap in �gmetallic�h nanotubes.
Tu-P.38	17:45	High resolution measurements to determine the permittivity in artificial structures
		Christian Krebs; A. Hommes; D. Nüßler; R. Brauns Fraunhofer FHR, Germany
		The knowledge of material properties is a task for quality control applications. Therefore the determination of the permittivity år is essential to get insight in material volume information. The following paper describes a measurement method to determine år.
Tu-P.39	17:45	Intense Terahertz Field-Induced Electroabsorption in Carbon Nanotubes
		Ryo Shimano; T.O. Ogawa; S.W. Watanabe University of Tokyo, Japan
		The effect of intense terahertz (THz) pulses on single-walled carbon nanotubes is investigated by THz -pump and optical-probe experiments. An ultrafast electroabsorption possessing a THz bandwidth is observed at exciton resonances near the optical communication wavelength and at room temperature.
Tu-P.41	17:45	Photoconductivity of Pb1-XSnXTe(In) Narrow-Gap Semiconductors with Variable Composition and Microstructure in the Terahertz Range
		Ludmila Ryabova1; A. Dobrovolsky1; V. Chernichkin1; D. Khokhlov1; Z. Dashevsky2; V. Kasiyan2; A. Nicorici3; S. Ganichev4; S. Danilov4; V. Bel'kov4 1Moscow State University, Russian Federation; 2Ben-Gurion University, Israel; 3Institute of Applied Physics, Moldova, Republic of; 4University of Regensburg, Germany
		Photoconductive response at wavelengths up to 500 µm has been detected in Pb1-XSnXTe(In) solid solutions. The effect is observed both in the semi-insulating state and at high levels of electron gas degeneracy. The film microstructure affects the photosensitivity strongly
Tu-P.42	17:45	Accurate optical constants of ZnTe measured by THz-TDS with their standard deviations
		Saroj Tripathi1; M. Aoki1; T. Asahi2; I. Hosako3; N. Hiromoto1 1Shizuoka University, Japan; 2Nippon Mining and Metals Co. Ltd., Japan; 3National Institute of Information and Communication Technology, Japan
		We measured the accurate optical constants of ZnTe using THz-TDS. Random errors in these constants are investigated by modeling the standard deviation in intensity and phase spectra and using the law of error propagation. Uncertainty in sample thickness is also included to compute resultant errors.
Tu-P.43	17:45	Optical properties PbTe/CdTe heterostructures
		Huizhen Wu1; C. Cai2; L. Hu3 1Dept of Physics, Zhejiang University, China; 2Dept of Physics, China; 3Dept pf Physics, Zhejiang University, China
		We report the synthesis of PbTe/CdTe heterostucture and study of optical properties. Interesting Optical propteries in the PbTe/CdTe heterostructure are observed by synchrotron radiation photoelectron spectroscopy, mid-infrared photoluminescence and Raman scattering spectroscpies.
Tu-P.44	17:45	Layer-by-layer photoluminescence and photoreflectance analysis of impurity distribution in HgCdTe
		J. Shao1; X. Lu1; Y. Wei2; J. Yang2 1National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy o, China; 2Research Center for Advanced Materials and Devices, Shanghai Institute of Technical Physics, Chinese, China
		Layer-by-layer infrared photoluminescence and photoreflectance measurements are performed on an HgCdTe epliayer. The Cd composition and impurity states along the growth direction are examined, and the vertical distribution is discussed.
Tu-P.45	17:45	Temperature Studies of Dielectric Loss in Silicon Carbide
		Charles Jones; Y. Gao North Carolina Central University, United States
		Results for the variation of loss tangent with temperature will be reported for crystalline Silicon Carbide and compared with theoretical expectations based on a two-phonon difference process.
Tu-P.46	17:45	Terahertz induced nonlinear effects in doped Silicon observed by open-aperture Z-scan
		Gurpreet Kaur; P.Y. Han; X.C. Zhang Rensselaer Polytechnic Institute, United States
		We demonstrate the field dependent enhancement of transmission of intense Terahertz(THz) pulses in doped Silicon.The strong field-carriers interaction lead to intervalley scattering. The change in mobilities in different valleys leads to 18% enhancement in transmission at peak THz field of 135 kV/cm
Tu-P.47	17:45	Enhanced Transmission of Terahertz Waves through Subwavelength Apertures in Carbon Nanotube Network Films
		Yeong-Hwan Ahn1; J.T. Hong1; D.J. Park1; F. Rotermund1; S. Lee1; D.S. Kim2; Y.H.A. Ahn1 1Ajou University, Korea, Republic of; 2Seoul National University, Korea, Republic of
		We demonstrate enhanced terahertz wave transmission through carbon nanotube films with subwavelength apertures. The peak frequency of the transmitted waves matches well with the shape resonance, mainly determined by the length of the apertures and the refractive index of surrounding media.
Tu-P.48	17:45	Polarization dependent terahertz band pass filters with asymmetric cross shaped hole arrays
		G.S. Park1; D.H. Choi1; H.R. Park2; Y.M. Park2 1Center for THz-Bio Application Systems, Department of Physics and Astronomy, Korea, Republic of; 2Department of Physics and Astronomy, Seoul National University, Korea, Republic of
		Polarization dependent transmission of terahertz wave through the asymmetric cross shaped hole array was measured. Experimental results show good agreement with the simulated results. This filter can be used to such applications as THz spectroscopy and biological sensing.
Tu-P.49	17:45	Dielectric Measurement of Low Loss-Tangent Dielectric near 100 GHz by a Simplified Hemispherical Open Resonator Technique
		A. Srivastava; O.J. Kwon; A. Bera; I.K. Baik; G.S. Park Center for THz-Bio Application Systems, Korea, Republic of
		A high Q-hemispherical open resonator with W-band vector network analyzer enables a precise and fast determination of the permittivity and loss tangent of low-loss dielectrics near 100GHz. The implemented frequency variation method showed standard deviation in dielectric measurements less than 0.06.
Tu-P.50	17:45	Precise measurements of optical constants of SiC in 40 to 120 m wavelength region
		kazuya nakayama1; A.M. Matsubara1; S.O. Okajima1; K.K. Kawahata2; K.T. Tanaka2; T.A. Akiyama2; H.K. Kinoshita3; M.Y. Yoshimoto3; T.T. Takahashi4 1chubu university, Japan; 2NIFS, Japan; 3Kyoto Institute of Technology, Japan; 4Mutsumi Corporation, Japan
		Optical constants of SiC have been measured by using FIR lasers of 48, 57, 71, and 119 µm. The refractive index and absorption coefficient have been determined from the transmittance of a rotating SiC etalon. For the application of SiC to optical elements, it was compared with other materials.
Tu-P.51	17:45	Measurement of the complex refractive index of liquids in the terahertz range using ellipsometry
		Adrian Dobroiu; C. Otani RIKEN, Japan
		We used ellipsometry to determine the complex index of refraction of liquids in the terahertz range. The method works by allowing a polarized terahertz wave to reflect on the interface between high-resistivity silicon and the liquid sample, and analyzing the polarization state of the reflected wave.
Tu-P.52	17:45	Submillimeter wave sintering of pure alumina ceramics
		S. Mitsudo1; K. Watanabe1; K. Sako1; S. Tani1; N. Nakagawa1; T. Idehara1; T. Saito1; S. Sano2 1Research Center for Far-Infrared Region, University of Fukui, Japan; 2 National Institute of Advanced Industrial Science and Technology, Japan
		The sub-millimeter (300 GHz) wave sintering of the alumina ceramics had been performed. The sub-millimeter wave sintering curve shows the sintering slower at the same temperature, for sub-millimeter wave processing as compared to millimeter wave processing.
Tu-P.53	17:45	THz generation in lithium niobate crystal with tapered end placed within a hollow waveguide
		Anahit Nikoghosyan1; H.P. Roeser2; A. Nikoghosyan3; A. Nikoghosyan4 1Yerevan State University, Armenia; 2Institute of Space Systems, University Stuttgart, Germany; 3Yerevan State university, Armenia; 4YEREVAN STATE UNIVERSITY, Armenia
		The results of the THz pulse generation by ps and fs laser pulses in LiNbO3 crystal are presented. Detection of THz pulse are performed at room temperature both by Schottky diode and ZnTe crystal. The quantum efficiency of energy conversion up to 28% of maximum value is obtained with Schottk
Tu-P.54	17:45	Laser Driven Terahertz Dielectric Wedge Antenna Placed in Free Space or in Hollow Metallic Waveguide
		Anahit Nikoghosyan; A.S. Nikoghosyan Yerevan State University, Armenia
		Results on effective generation of THz radiation in band 0.1-2.5 THz via optical rectification of femtosecond laser pulses in LiNbO3 plate tapered at the end are presented.
Tu-P.55	17:45	Sub-Terahertz Transceiver Module Integrating Uni-Traveling-Carrier Photodiode, Schottky Barrier Diode, and Planar Circulator Circuit
		Hiroshi Ito1; K. Yoshino2; Y. Muramoto2; H. Yamamoto1; T. Ishibashi3 1Kitasato University, Japan; 2NTT Photonics Laboratories, Japan; 3NTT Electronics, Japan
		A sub-terahertz transceiver module integrating a uni-traveling-carrier photodiode, a Schottky barrier diode, and a planar circulator circuit is developed. A resonant behavior with an isolation of about 14 dB is realized by the circulator circuit, demonstrating a transceiver function at 270 GHz.
Tu-P.56	17:45	Terahertz radiation from air plasma, generated by linearly polarized femtosecond pulses with short focal length lens
		Daniil Fadeev; V.A. Mironov Institute of Applied Physics Russian Academy of Sciences, Russian Federation
		New theoretical approach for terahertz radiation from air plasma generated by linearly polarized laser pulses focused by short focal length lens is presented. The theory describes new experimental effect of non-symmetric radiation pattern determined by laser pulse polarization.
Tu-P.57	17:45	Specific features of terahertz radiation from air plasma generated by both the first and the second optical harmonics
		Mironov Vyacheslav1; D.A. Fadeev2 1Institute of Applied Physics Russian Academy of Sciences, Russian Federation; 2Instute of Applied Physics Russian Academy of Sciences, Russian Federation
		The theory describing specific features of the source of terahertz waves generated due to the breakdown of air by both the first and the second harmonics of laser pulse is introduced. The approach considers inside physics of low frequency current formation during the ionization.
Tu-P.58	17:45	Fine Tuning Terahertz Generation in Fanned-out Periodically Poled Stoichiometric Lithium Tantalate Crystal
		Nan Ei Yu1; K.S. Lee1; D.-.K. Ko1; S. Takekawa2; K. Kitamura2 1Gwangju Institute of Science and Technology, Korea, Republic of; 2National Institute for Materials Science, Japan
		Continuous tunable terahertz pulses were generated with a continuous grating-period change from 65 to 90 ¥ìm in periodically poled stoichiometric lithium tantalate crystal. Center frequency was tuned from 0.9 to 1.3 THz with as narrow as band-width of 21 GHz at crystal temperature of 130 K.
Tu-P.59	17:45	Thickness dependence of intense terahertz emission from InAs thin films
		Y. Ishibashi1; S. Sasa1; T. Maemoto1; M. Inoue1; K. Takeya2; M. Tonouchi2 1Osaka Institute of Technology, Japan; 2Osaka University, Japan
		Intense terahertz emission was observed from InAs thin films grown on a GaAs substrate. The emission intensity increased as the film thickness increased up to 1 µm and became stronger than that from a p-type InAs substrate. The possible mechanism including the thickness dependence is presented.
Tu-P.60	17:45	Emission of terahertz radiation from dipole photoconductive antennas with several geometrical parameters
		Fumiaki Miyamaru1; K.Y. Yamamoto2; T.F. Furuya2; S.N. Nishizawa3; M.T. Tani2 1Shinshu University, Japan; 2Fukui University, Japan; 3Advanced Infrared Spectroscopy Co., Ltd., Japan
		The dependence of the emission spectrum of terahertz (THz) radiation on the geometrical parameters of the dipole antenna, and the relationship between these parameters and the temporal characteristics of the transient input field is reported.
Tu-P.61	17:45	Frequency Stabilization of Photo-Mixing Generated Signal Using a Single Michelson Interferometer
		T. Laurent; S. Ginestar; S. Blin; L. Chusseau; C. Palermo; J. Torres; P. Nouvel; L. Varani Institut d'Electronique du Sud, Université de Montpellier 2, France
		We investigate the possibility to use a single interferometer, instead of two, to stabilize the frequency of a THz radiation generated by optical beating between two continuous- wave lasers.
Tu-P.62	17:45	Tunable Terahertz Radiation Generated by using a Spatially Dispersed Femtosecond Optical Pulse
		K. Maki; C. Otani Advanced Science Institute, RIKEN, Japan
		The generation of terahertz (THz) radiation is demonstrated by using the spatial dispersion of an femtosecond optical pulse. The overlap of two dispersed beams with a spatial shift allows us to generate a monochromatic radiation on the basis of photo mixing, and additionally to tune its frequency.
Tu-P.63	17:45	Stabilization of Terahertz Wave Generation by Using Chaotic oscillation in a Laser
		Fumiyoshi Kuwashima1; S. Taniguchi2; K. Nonaka2; M. Hangyou3; H. Iwasawa4 1Fukui University of Technology, Japan; 2Kagoshima National College of Technology, Japan; 3Osaka University, Japan; 4Professor Emeritsu, Fukui University, Japan
		Stabilization of a THz Wave using a chaotic oscillation in a multimode semiconductor laser with an optical delayed feedback by the external mirror is investigated. Stabilization and the wide spectrum of THz waves are so obtained by using a chaotic laser compared with that of using a CW laser.
Tu-P.64	17:45	Dual wavelength cw microlaser for the generation of THz radiation.
		J.F. Roux1; F. Pallas2; E. Herault1; G. Grosa2; J.L. Coutaz1; A. Kevorkian3; F. Thibault3; G. Vitrant2 1IMEP-LAHC, Universite de Savoie, France; 2IMEP-LAHC, INP Grenoble, France; 3TEEM PHOTONICS, France
		Dual wavelength compact microlaser operation is demonstrated in the cw regime using a c-cut Nd doped GdVO4 crystal. More than 200mW is obtained at these two wavelengths which are separated by 2.2nm leading to potential generation of 0.6THz radiation with this compact low-cost optical source.
Tu-P.65	17:45	Terahertz spectroscopy based on tunable p-Ge laser operating in the cyclotron resonance mode
		Oleg klimenko1; Y.A. Mityagin2; S.A. Savinov2; V.N. Murzin2; N.V. Dyakonova1; P. Solignac1; W. Knap1 1University Montpellier 2, France; 2P.N. Lebedev Physical Institute of RAS, Russian Federation
		We present a prototype of tunable p-Ge laser, and test it as a source for THz spectroscopy. The emission line is continuously tunable by magnetic field in the range 1.2-2.8 THz (40-90 cm-1) with the linewidth about 6 GHz (0.2 cm-1) and successfully applied for water vapour spectroscopy.
Tu-P.66	17:45	Efficient Optical Excitation of THz Plasmons on a Structured Metal Surface
		M.I. Bakunov1; M.V. Tsarev1; S.B. Bodrov2 1University of Nizhny Novgorod, Russian Federation; 2Institute of Applied Physics RAS, Russian Federation
		We propose to launch terahertz surface plasmons on corrugated metal surfaces by ultrashort laser pulses. The plasmons are emitted by nonlinear polarization created by the pulse in a strip of electro-optic medium deposited on the surface. The technique can be used for terahertz surface spectroscopy.
Tu-P.67	17:45	CW THz generation by In0.53Ga0.47As photomixer with TEM-Horn antenna driven at 1.55 m wavelengths
		E. Peytavit1; F. Meng2; D. Gacemi2; J.F. Lampin1; T. Akalin1; J. Mangeney2 1IEMN, France; 2UMR 8622/ Univ Paris Sud, France
		We report cw generation delivered by ion-irradiated In0.53Ga0.47As photomixers coupled to TEM-horn antenna driven at 1.55 µm wavelength. Output powers up to 0.1 µW at 700 GHz have been achieved. The output power in a regime of Ohmic transport or recombination-limited transport is analyzed.
Tu-P.68	17:45	Transmission Lines Power Measurements for the 110 GHz Electron Cyclotron Heating System on DIII-D and Gyrotron Operational Performance
		M.C. Cengher; J. Lohr; D. Ponce; Y. Gorelov; C.P. Moeller General Atomics, United States
		Operational trends for the DIII-D 6 gyrotron ECH system are presented. Transmission line losses were measured & values near theoretical ones were attained for one line. Improved alignment and reduction of the number of miter bends will increase the power transmitted through the waveguide to DIII-D.
Tu-P.69	17:45	Designs of New Components for ITER ECH & CD Transmission Lines
		Robert Olstad; J.L. Doane; C.P. Moeller; C.J. Murphy General Atomics, United States
		The 2 MW cw ITER ECH&CD transmission line components will require enhanced cooling and some new or modified designs. Transmission line components between the closure plate and the tritium barrier window have special design considerations to assure tritium retention. Design aspects will be presented.
Tu-P.70	17:45	Status of the ITER Electron Cyclotron H&CD System
		Caroline Darbos1; F. Albajar2; S. Alberti3; T. Bonicelli2; A. Bruschi4; R. Chavan3; S. Cirant4; M. deBaar5; D. Farina4; T.P. Goodman3; J.P. Hogge3; W. Kasparek6; J.D. Landis3; A. Moro4; I. Paganakis3; P. Platania4; B.P. Blaum6; E. Poli6; G. Ramponi4; D. Ronden5; G. Saibene2; F. Sanchez3; C. Sozzi4; D. Strauss7; O. Sauter3; H. Zohm6; U. Baruah8; S.L. Rao8; M. Kushwah8; T. Scherer7; S. Kern7; N.P. Singh8; K. Kajiwara9; N. Kobayashi9; Y. Oda9; K. Sakamoto9; K. Takahashi9; G.D. Denisov10; T. Bigelow11; J. Caughman11; D. Rasmussen11; M. Shapiro12; R. Temkin12; B. Becket13; D. Cox13; F. Gandini13; T. Gassmann13; M.A. Henderson13; O. Jean13; C. Nazare13; T. Omori13; D. Purohit13 1ITER Organization, France; 2F4E, Spain; 3CRPP, Switzerland; 4IFP, Italy; 5FOM, Netherlands; 6IPP, Germany; 7KIT, Germany; 8IPR, India; 9JAEA, Japan; 10IAP, Russian Federation; 11ORNL, United States; 12MIT, United States; 13IO, France
		The paper presents the status of the 20 MW ECH&CD system developed for ITER. Progress includes agreement on the first procurement arrangement, advancing the design of all components to conceptual or preliminary design stage, optimization of gyrotrons performances and finalization of launcher design.
Tu-P.71	17:45	A TE6,2 94GHz quasi-optical mode converter
		Xin-jian Niu Vacuum Electronics National Laboratory, Institute of High Energy Electronics,, China
		A quasi-optical mode converter transforming a TE6,2 mode to a Gaussian-like mode is proposed. Optimal structure parameters of the converter are obtained by the code. Optimization gives a Gaussian mode content more than 70% and a transmission efficiency over 85% for TE6,2 mode at 94GHz.
Tu-P.72	17:45	Quasi-Optical HE11-mode exciter for coupling into oversized Circular Corrugated Waveguide
		M. Sakaguchi1; H. Idei2; T. Saito3; T. Shigematsu3 1Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Japan; 2Research Institute for Applied Mechanics, Kyushu University, Japan; 3FURUKAWA C&B CO., LTD, Japan
		QO HE11-mode exciter has been designed for a mode coupling into the CC waveguides. It contains a feed antenna system and QO mirror system. The main mode and the unwanted modes generated from the feed antenna are led to two quasi-optical mirrors. The mirror system can remove the unwanted HE12 mode.
Tu-P.73	17:45	Time Resolved THz-Spectroscopy of As-Implanted GaAs
		Shriganesh Prabhu Tata Institute of Fundamental Research, India
		We study the carrier lifetime in As implanted semi-insulating GaAs (SI-GaAs) using various dosages of the As-ion. Using infra-red (IR) pump and THz as a probe, we study the time resolved transmission curves at room temperature and calculate the lifetimes of the carriers in the SI-GaAs:As.
Tu-P.74	17:45	Femto-chemometrics: The signal processing of fast pulse transients.
		J. Bowen University of Reading, United Kingdom
		Traditional chemometrics techniques are augmented with algorithms tailored specifically for the de-noising and analysis of femtosecond duration pulse datasets. The new algorithms provide additional insights on sample responses to broadband excitation and multi-moded propagation phenomena.
Tu-P.75	17:45	First Observation of a THz Photon Echo
		S.A. Lynch1; P.T. Greenland1; G. Aeppli1; N.Q. Vinh2; B. Redlich3; A.F.G. van der Meer3; C.R. Pidgeon4; B.N. Murdin5 1London Centre for Nanotechnology, University College London, United Kingdom; 2University of California, Santa Barbara, United States; 3FOM Institute for Plasma Physics, Netherlands; 4Heriot-Watt University, United Kingdom; 5Advanced Technology Institute, University of Surrey, United Kingdom
		We demonstrate THz photon echoes from silicon doped with phosphorus donors. We provide experimental evidence showing that the echo emerges at the predicted angle and that it arrives at our detector at the predicted time. We use this to demonstrate coherent control of the silicon donor states.
Tu-P.76	17:45	Analysis of optical THz-signals from mode-locked semiconductor laser by using a semiconductor optical amplifier-based detection
		Pascal Landais; R. Maldonado-Basilio; S. Latkowski school of Electronic Engineering, Ireland
		An all-optical approach based on nonlinear inter-actions inside a semiconductor optical amplifier for measuring the THz beat-tone of a passively mode-locked laser is proposed. This novel approach can be applied to beat-tone in the range from GHz to few THz.
Tu-P.77	17:45	Nonlinear generation and detection of THz pulses in ZnTe with chirped femtosecond laser pulses
		D.N. Erschens1; D. Turchinovich1; P.U. Jepsen2 1Technical University of Denmark, Denmark; 2Technical UNiversity of Denmark, Denmark
		We show measurements and simulations of difference-frequency generation of THz pulses and subsequent free-space electro-optic sampling with prechirped femtosecond pulses in ZnTe. Negative prechirping enhances the efficiency due to compression of the laser pulse in the dispersive nonlinear crystal.
Tu-P.79	17:45	Electronically Controlled Optical Sampling Terahertz Time-Domain Spectroscopy
		Y. Kim; D.S. Yee Korea Research Institute of Standards and Science, Korea, Republic of
		We present the first demonstration of high-speed terahertz time-domain spectroscopy using the electronically controlled optical sampling method. Employing two synchronized femtosecond Ti:sapphire lasers with a 100 MHz repetition frequency, the time delay is repetitively scanned via phase modulation.
Tu-P.80	17:45	Simulation on Circular Dichroism of the Water Clusters in THz Range
		Xiaolong Tian; Y.D. Gong; H. Dong Institute for Infocomm Research, Singapore
		The spectra of water clusters in the gas phase are calculated by using Ab initio calculation and molecular dynamics. The result reveals that the non-chiral water molecules have circular dichroism (CD) effect in THz range due to the hydrogen bondings between the molecules.
Tu-P.81	17:45	Design and Performance of ALMA Band 5 Receiver Cartridge
		V. Belitsky; I. Lapkin; B. Billade; A. Pavolotsky; E. Sundin; O. Nyström; D. Meledin; V. Desmaris; M. Strandberg; H. Rashid; G. Johnsen; D. Dochev; M. Fredrixon Chalmers University of Technology, Sweden
		Atacama Large Millimetre Array, Band 5 receiver cartridge covers 163 – 211 GHz. We present the design and performance of the ALMA Band 5 receiver. The interest to Band 5 is driven by the 183 GHz water line and the C+ 158µ line from objects at redshifts between 8.0 - 10.6 to appear in the band.
Tu-P.82	17:45	Detection of Biochar Components for Soil Fertility using THz-TDS
		Elise Pogson1; J. Horvat1; R.A. Lewis1; S.D. Joseph2 1University of Wollongong, Australia; 2University of NSW, Australia
		Different forms of biochar can have greatly different properties as fertilizers, yet there is no effective screening method to distinguish them. Terahertz Time-Domain Spectroscopy has been used to distinguish various biochars, including Sawdust char, BMC5 with lime char and Saligna char.
Tu-P.83	17:45	Terahertz spectroscopy of polyaromatic hydrocarbons
		George Swift; N. Kaliteevskaya; K.L. Johnson; J.M. Chamberlain; A.J. Gallant University of Durham, United Kingdom
		In this work we are beginning to determine the terahertz dielectric properties of various polyaromatic hydrocarbons. Terahertz spectroscopy of such organic compounds has seen rather less work undertaken in recent years than that carried out in some other areas.
Tu-P.84	17:45	The bench marking of tilted dual reflectors for implementation in Cosmic Microwave Background bolometric interferometry.
		D. Bennett EXPERIMENTAL PHYSICS N.U.I.M, Ireland
		The CMB has a black body spectrum that peaks at 160.2 GHz. Bolometric interferometers are now being investigated in order to quantify the degree of CMB polarization. We examine the applicability of various off axis telescopes to induce the phase shifts required to generate intensity fringe patterns.
Tu-P.85	17:45	Application of THz spectroscopy to pesticide detection
		T.S. Suzuki; Y.O. Ogawa; N.K. Kondo Kyoto university, Japan
		Application possibility of THz spectroscopy to pesticide inspection in agricultural products was studied. Several pesticides showed specific absorption in THz region, and a high correlation was obtained between the concentration and the second derivative value of spectra.
Tu-P.86	17:45	On the Appropriateness of the Double-Stream Approximation for Mathematical Consideration of Atmosphere Warming by |Infrared Radiation of the Earth
		Kniazkov Leonid Institute of Radio Astronomy National Academy of Sciences of Ukraine, Ukraine
		The rigorous consideration of a process of heat transmission from the Earth surface though “grey” atmosphere is presented. Degree of inaccuracy of the traditional double-stream approximation for treatment of green house effect is determined.
Tu-P.87	17:45	Measurement Accuracy of S-parameters in W band at Cryogenic Temperature
		Mario Zannoni; A. Baù; M. Gervasi; A. Passerini; S. Spinelli; A. Tartari; G. Sironi Univerity of Milano Bicocca, Italy
		Room temperature VNA calibration to measure cryogenic devices can be inadequate when the loss of the unavoidable thermal decoupling line is order of magnitude higher than the DUT one. We present a cryogenic calibration set-up with an accuracy at the level of some tens of milli-dB for S21 parameter.
Tu-P.88	17:45	Realization of refractive polarizing Fourier Transform Spectrometer for Cosmic Microwave Background polarization observation
		Yuan Luo1; M. Hattori1; N. Ebizuka2; T. Matsumura3; I.S. Ohta4 1Tohoku University, Japan; 2Nagoya University, Japan; 3California Institute of Technology, United States; 4Kinki University, Japan
		We proposed an application of the refractive polarizing Fourier Transform Spectrometer (r-FTS) to millimeter submillimeter wave multiband polarimetry. In this paper, the results of optical experiments in millimeter wavebands, aiming to verify the performance, will be reported.
Tu-P.89	17:45	In-orbit performace and calibration of SMILES
		Satoshi Ochiai1; K. Kikuchi2; T. Nishibori2; T. Manabe3; H. Ozeki4; R. Sato2; T. Sano2; Y. Irimajiri1; M. Shiotani5 1National Institute of Information and Communications Technology (NICT), Japan; 2Japan Aerospace Exploration Agency (JAXA), Japan; 3Osaka Prefecture University, Japan; 4Toho University, Japan; 5Kyoto University, Japan
		Superconducting Submillimeter-Wave Limb-Emission Sounder (SMILES) is a sensor for atmospheric bservation at 640 GHz from the International Space Station. Since the launch in Sep. 2009, SMILES has been showing the excellent observation performance. The results of SMILES development are summarized.
Tu-P.90	17:45	The application of terahertz non-stationary gas spectroscopy for ecological monitoring
		Vladimir Vaks; E.G. Domracheva; S.I. Pripolzin; E.A. Sobakinskaya; M.B. Chernyaeva Institute for Physics of Microstructures RAS, Russian Federation
		The possibilities of application of non-stationary gas spectroscopy method of terahertz frequency range for goals of ecological monitoring are considered. The theoretical and experimental results of dichloroethane investigations are presented.
Tu-P.91	17:45	Development of Germanium BIB detector with surface activated bonding and Molecular-Beam Epitaxial crystal growth
		Takehiko Wada1; H. Kaneda2; R. Kano2; K. Wada1; T. Suzuki1; K. Watanabe3; Y. Kiriyama2 1Japan Aerospace Exploration Agency, Japan; 2Nagoya University, Japan; 3The university of Tokyo, Japan
		We are developing Germanium BIB detector for future mid- and far-infrared astronomical missions. In order to obtain clear interface between blocking and IR active layers, we have tested two new method, Surface Activated Bonding (SAB) and Molecular Beam Epitaxial (MBE) crystal growth.
Tu-P.92	17:45	Bunch-to-bunch Coherence of Coherent Synchrotron Radiation from the Electron Storage Ring BESSY II
		Ulrich Schade1; J.S. Lee2; M. Ortolani3; B. Marchetti4; T. Neitzke5 1Germany; 2University of Tokyo, Japan; 3CNR , Istituto di Fotonica e Nanotecnologie, Italy; 4INFN - Roma "Tor Vergata", Italy; 5Helmholtz Zentrum Berlin, Germany
		CSR is powerful spectroscopic source in the THz range at storage rings. Instabilities in the electron distribution causes fluctuations in the emitted THz radiation which can be studied by measuring the the bunch-to-bunch coherence.