Thursday, September 09, 2010

	09:00 - 10:30	Thursday Plenary	Aula Magna
		Chair: K. Fukunaga

PL.09	09:00	The Future of Medical Imaging
		Vincent Wallace1; E. Pickwell-MacPherson2; C. Reid2 1University of Western Australia, Australia; 2Hong Kong University of Science and Technology, Hong Kong
		Medical physics is advancing rapidly, making use of many imaging/spectroscopic techniques across the electromagnetic spectrum. There are many cases where the demand for a medical imaging technique that is safe and non-invasive has not been met. Can terahertz meet that need?
PL.10	09:45	Exploitation of the entire electromagnetic spectrum in art conservation studies
		Mauro Bacci IFAC-CNR, Italy
		The use of electromagnetic waves to investigate works of art is reviewed considering the whole interval from X-rays up to radiofrequencies paying particular attention to non-invasive and transportable instrumentation

	11:00 - 12:30	Materials 4	Aula Magna
		Chair: P. Calvani

Th-A1.1	11:00	Developing InP-based solar cells: time-resolved terahertz measurements of photoconductivity and carrier multiplication efficiencies
		Ben Spencer1; D.M. Graham1; C. Lange2; S. Chattopadhyay3; W.R. Flavell1 1Photon Science Institute, University of Manchester, United Kingdom; 2University of Toronto, Canada; 3Cockcroft Institute, United Kingdom
		Time-resolved terahertz spectroscopic studies were carried out on bulk InP to measure photoconductivity on the picosecond timescale. The carrier multiplication quantum yields clearly demonstrate the potential benefit of colloidal InP-based next-generation solar cells.
Th-A1.2	11:30	Pump/probe THz Spectroscopy of the Conductivity of TTF-TCNQ Films
		H.G. Roskos1; J. Nishitani2; V. Blank1; F.Z. Meng1; M.D. Thomson1; T. Nagashima2; M. Hangyo2; V. Solovyeva1; M. Huth1 1Physikalisches Institut, Goethe-Universität Frankfurt, Germany; 2Institute of Laser Engineering, Osaka University, Japan
		We perform optical-pump/THz-probe measurements on TTF-TCNQ films in the metallic state to study the picosecond conductivity dynamics. The data suggest charge-density-wave formation on a time scale of 10 ps following an ultrafast thermali-zation process.
Th-A1.3	11:45	THz studies of multigap superconductors
		Andrea Perucchi1; S. Lupi2; M. Ortolani3; D. Nicoletti4; D. Di Castro5; M. Putti6; C. Ferdeghini7; P. Dore4; L. Baldassarre1 1Sincrotrone Trieste S.C.p.A., Italy; 2CNR-IOM and Laboratorio TASC and Universita di Roma "Sapienza", Italy; 3CNR-Istituto di Fotonica e Nanotecnologie, Italy; 4CNR-SPIN and Universita di Roma "Sapienza", Italy; 5CNR-SPIN and Universita di Roma Tor Vergata, Italy; 6CNR-SPIN and Universita di Genova, Italy; 7CNR-SPIN and Universita di Genova, Israel
		We report on THz reflectivity results on multigap superconductors: The prototype multiband superconductor MgB2, the A-15 compound V3Si, and Co-doped BaFe2As2. Our results highlight the applicability of a parallel resistor model to describe the THz properties of multigap superconductors
Th-A1.4	12:00	High Pressure Infrared Studies of Correlated Electron Materials using Synchrotron Radiation
		Hidekazu Okamura1; M. Matsunami2; K. Shoji1; T. Nanba1 1Kobe University, Japan; 2University of Tokyo, Japan
		We have studied the IR reflectance of correlated electron materials under high pressure to 20 GPa, using synchrotron radiation as a highly bright IR source. We will describe the instrumentation for this challenging experiment, and recent results on heavy electron and superconducting materials.
Th-A1.5	12:15	THz spectroscopy of Ceramics and Polycrystalline Materials for Characterization of Microwave Dielectric Properties
		K.M. Siegrist1; D.F. Plusquellic2; M.E. Thomas1 1Johns Hopkins University, United States; 2National Institute of Standards and Technology, United States
		Microwave dielectric properties of ceramic and polycrystalline materials are governed by temperature dependent multi-phonon difference frequency bands in the THz. Measurements of the lower absorption band edge are combined with a classical oscillator model to successfully characterize MW dielectric.
Th-A1.6	12:30	Study on Random Errors in THz Signal and Optical Constants Observed with THz Time-Domain Spectroscopy
		Norihisa Hiromoto; S.R. Tripathi; M. Takeda; M. Aoki Shizuoka University, Japan
		We have observed random errors in THz intensity and phase spectra measured with THz-TDS, which are almost proportional to THz intensity and phase respectively and common for reference and sample. We discuss the characteristics of random errors and application to improving accuracy of THz-TDS.

	11:00 - 12:30	Biology 3	Aula Minor
		Chair: S. Joo-Hiuk

Th-B1.1	11:00	Can Neurons Sense Millimeter-Waves?
		Peter Siegel1; V. Pikov2 1California Institute of Technology, United States; 2Huntington Medical Research Institutes, United States
		We present the first direct evidence of real time, millimeter-wave (60 GHz) induced changes in cortical slice individual neuronal activity at RF exposure levels (<300nW/cm2) more than 1000X below the MPE. The results have implications for non-contact stimulation of neurons in vivo.
Th-B1.2	11:30	Investigating the Role of Water Content on the Terahertz Properties of Rat Liver Cirrhosis
		S.Y. Huang1; S.M.Y. Sy1; E. Pickwell-MacPherson2 1Department of Electronic Engineering, The Chinese University of Hong Kong, Hong Kong; 2Hong Kong University of Science and Technology, Hong Kong
		We previously reported the dielectric properties of normal and diseased rat liver tissues by THz pulsed imaging. In this work further experiments were carried on to understand the observed differences in the optical parameters by looking into the water contents of the normal and cirrhotic specimen
Th-B1.3	11:45	THz Imaging of Skin Tissue - Exploiting the Strong Reflectivity of Liquid Water
		Elliott Brown1; Z.D. Taylor2; P. Tewari2; R.S. Singh2; M.O. Culjat2; D.B. Bennett2; W.S. Grundfest2 1Wright State University, United States; 2UCLA, United States
		We present a novel system for imaging burns and other lesions of human skin tissue utilizing the acute sensitivity of THz radiation to water concentration. We have engineered and delivered (to UCLA Medical School) a THz impulse radar that carries out reflective, 2D imaging by mechanical scanning.
Th-B1.4	12:00	Terahertz Imaging of Paraffin-Embedded VX2 Hepatoma Model
		Jaeyeon Park1; H.J. Choi2; H. Lim3; J.H. Son1 1University of Seoul, Korea, Republic of; 2University of Ulsan, Korea, Republic of; 3Ajou University, Korea, Republic of
		We evaluated the diagnostic feasibility of THz imaging technique for the VX2 tumor with spectroscopic information.
Th-B1.5	12:15	Investigation of spectral features of progesterone, 17-hydroxyprogesterone and cortisone in THz range
		Olga Cherkasova1; M.M. Nazarov2; D.A. Sapozhnikov2; A.P. Shkurinov2; V.A. Volodin3; V.A. Minaeva4; V.F. Minaev4; G.V. Baryshnikov4 1Institute of Laser Physics SB RAS, Russian Federation; 2ILC M.V.Lomonosov Moscow State University, Russian Federation; 3cInstitute of Semiconductor Physics SB RAS, Novosibirsk State University, Russian Federation; 4Bogdan Khmelnitskij National University, Ukraine
		The THz and Raman spectra of progesterone, 17α-hydroxyprogesterone and cortisone in the region of low-frequency infrared vibrations have been measured. Several intensive bands have unusual temperature dependence. Vibration frequencies are calculated by density functional theory.

	11:00 - 12:30	Art conservation and diagnostics	Room 2
		Chair: K. Fukunaga

Th-C1.1	11:00	Terahertz investigation of Egyptian artifacts
		julien labaune1; J.B. Jackson2; S. Pagès-Camagna3; M. Menu3; G.A. Mourou2 1ILE-C2RMF, France; 2ILE, France; 3C2RMF, France
		THz TDS can be use to image optically opaque objects or detect different materials. In this presentation we propose to use terahertz to analyze different types of Egyptian artifact
Th-C1.2	11:30	THz spectroscopy and chemometrics for quantitative determination of chemical properties and dating of historic paper
		T. Trafela1; M. Mizuno2; K. Fukunaga2; M. Strlic3 1Faculty of Chemistry and Chemical Technology, Slovenia; 2National Institute of Information and Communications Technology, Japan; 3University College London, United Kingdom
		THz spectroscopy and chemometrics have been used for determination of chemical properties of historic paper. For the first time, the potential of the THz technique for quantitative chemical characterisation of complex natural organic materials has been demonstrated.
Th-C1.3	11:45	Feasibility of millimeter wave imaging as tool for nondestructive inspection of wood and wooden structures
		Yoshihisa FUJII1; Y. Fujiwara2; S. Tanaka2; S. Okumura2; H. Togo3; A. Mochizuki3; N. Kukutsu3 1Graduate School og Agriculture, Kyoto University, Japan; 2Kyoto University, Japan; 3NTT Microsystem Integration Laboratories, Japan
		Dielectric properties of wood were estimated by millimeter wave of 100GHz. The influence of cellular structure, moisture content and inner defect on the imaging was clarified. The feasibility of the millimeter imaging for nondestructive evaluation of wood and wooden structure was confirmed
Th-C1.4	12:00	Terahertz-pulse imaging for non-destructive analysis of layered art paintings
		E. Abraham1; A. Younus2; J.C. Delagnes1; P. Mounaix1 1CPMOH - Université de Bordeaux, France; 2CPMOH - Université de Bordeaux, Pakistan
		Terahertz-pulsed imaging is employed to reveal primary graphite sketches covered with multiple layers of paintings. Buried layer information, such as handmade sketches drawn with pencil leads were identified by both reflection and transmission 2D imaging.
Th-C1.5	12:15	A simple electromagnetic model for buried interface detection via THz holographic data
		F. Soldovieri1; I. Catapano2; L. Crocco1; M.R. Scarfi1; A. Doria3; G.P. Gallerano3; E. Giovenale3; A. Petralia3 1IREA-CNR, Italy; 2irea-cnr, Italy; 3ENEA, Italy
		This work presents a simple electromagnetic model to deal with the reflection from a buried interface and to provide the basis of a reconstruction strategy whose data are given in terms of the intensity of the THz interference signal.

	11:00 - 12:30	Lasers	Room 3
		Chair: R. Miles

Th-D1.1	11:00	Emission of Terahertz Radiation from Two-Dimensional Electron Systems in Semiconductor Nano-Heterostructures
		Taiichi Otsuji Tohoku University, Japan
		This paper reviews recent advances in THz emission from 2D electron systems in semiconductor nano-heterostructures. The topics cover the broadband THz emission from 2D plasmons in III-V heterojunction transistors and amplified stimulated THz emission from fs-laser pumped graphene heterostructures.
Th-D1.2	11:30	Multi-frequency terahertz stimulated emission from optically pumped co-doped silicon crystals
		Sergey Pavlov1; R. Eichholz1; N.V. Abrosimov2; B. Redlich3; H.W. Hübers4 1German Aerospace Center, Germany; 2Leibniz Institute of Crystal Growth, Germany; 3FOM Institute for Plasma Physics, Netherlands; 4German Aerospace Center and Technische Universität Berlin, Germany
		Stimulated terahertz emission at different frequencies between 4.5 THz and 6.4 THz has been realized from a single silicon crystal doped simultaneously by two hydrogen-like donor centers, which were optically excited on intracenter transitions at low lattice temperature.
Th-D1.3	11:45	Stress dependent frequency shift in Si:Bi and Si:Sb THz lasers
		Roman Zhukavin1; K.A. Kovalevsky1; V.N. Shastin1; S.G. Pavlov2; H.W. Hübers2; H. Riemann3; N.V. Abrosimov3 1Institute for Physics of Microstructures, Russian Federation; 2Institute of Planetary Research, Germany; 3Institute for Crystal Growth, Germany
		It has been shown that external stress applied to bulk silicon doped by Bi and Sb influences on output emission spectrum under CO2 laser pumping. For small stress spin-orbit coupling of working states can be tuned. The details of changing depend on donor and crystallographic axis.
Th-D1.4	12:00	Gain and efficiency of THz donor lasing in axially stressed silicon
		Valery Shastin1; R. Zhukavin1; K. Kovalevsky1; V. Tsyplenkov1; S.G. Pavlov2; H.W. Hübers2 1Institute for Physics of Microstructures, Russian Federation; 2Institute of Planetary Research, Germany
		Results of experimental study of terahertz (4–6 THz) laser action of optically excited group-V donors (phosphor P, antimony Sb, arsenic As, bismuth Bi) in axially compressed silicon crystal which is observed at liquid helium temperatures are presented and discussed.
Th-D1.5	12:15	Performance of a compact, continuous-wave terahertz source based on a quantum-cascade laser
		Heiko Richter German Aerospace Center (DLR), Germany
		We report on the development of a compact, easy-to-use terahertz radiation source, which combines a quantum-cascade laser (QCL) with a compact, low-input-power Stirling cooler. The applicability of the system is demonstrated by imaging and molecular-spectroscopy experiment

	11:00 - 12:30	Gyrotrons 5	Room 7
		Chair: S. Alberti

Th-E1.1	11:00	THz Gyrotron FU CW Series for high power THz technologies
		Toshitaka Idehara; T. Saito; I. Ogawa; S. Mitsudo; Y. Tatematsu; R. Ikeda; J. Mudiganti; K. Kosuga University of Fukui, Japan
		Development of high frequency cw gyrotrons (Gyrotron FU CW Series) as high power far-infrared radiation sources was advanced in FIR FU. In this paper, we would introduce the development and applications of high frequency gyrotrons in FIR FU, including application to high power THz technologi
Th-E1.2	11:30	High-harmonic sectioned-cavity THz gyrotrons
		Andrey Savilov; I.V. Bandurkin; V.L. Bratman; Y.K. Kalynov; N.A. Zavolsky Institute of Applied Physics, Russian Federation
		A third-harmonic large-orbit THz gyrotron with a sectioned cavity, which combines a long electron-wave interaction region and a relatively low diffraction Q-factor, is described. A similar scheme can be used to realise a self-exciting two-wave gyrotron with frequency multiplication.
Th-E1.3	12:00	Development of continuously frequency tunable gyrotrons FU CW VI and FU CW VI A for application to 600 MHz DNP-NMR spectroscopy.
		R. Ikeda1; T. Idehara1; I. Ogawa1; K. Kosuga1; T. Saito1; Y. Matsuki2; K. Ueda2; T. Fujiwara2; T.H. Chang3 1Research Center for Development of Far-Infrared Region, University of Fukui, Japan; 2Institute for Protein Research, Osaka University, Japan; 3Department of Physics, National Tsing Hua University, Taiwan
		Gyrotron is needed to analyze the structures of complex proteins by DNP-NMR spectroscopy. We have been developing gyrotrons having boardband frequency tunability using a long cavity. Prototype gyrotron was achieved with a tuning range of 1.6 GHz and exceeded output power of 10 W.
Th-E1.4	12:15	Electromagnetic Pulse Self-Compression under Cyclotron Resonance Absorption by Plasma or Electron Beam
		Naum GInzburg; I. Zotova; A. Sergeev Institute of Applied Physics RAS, Russian Federation
		Based on analogy to well known process of self-induced transparency of optical pulse propagating through passive two-level media we describe effect of electromagnetic pulse self–compression under conditions of cyclotron resonance absorption by plasma or electron beams.
Th-E1.5	12:30	Development of high power sub terahertz gyrotrons for application to CTS measurement
		T. Saito1; Y. Tatematsu1; S. Ogasawara1; N. Yamada1; A. Fujii1; T. Idehara1; V.N. Manuilov2 1University of Fukui, Japan; 2Nizhny Novgorod State University, Russian Federation
		High power sub terahertz gyrotron are under development in FIR-FU for application to CTS. Succeeding to more than 50 kW second harmonic (SH) oscillation at 350 GHz with a demountable tube, SH oscillation exceeding 60 kW at 390 GHz was obtained with a newly fabricated sealed off gyrotron.

	11:00 - 12:30	Communications	Room 11
		Chair: F. Palma

Th-F1.1	11:00	Moving target indication with high resolution at long stand off ranges using minimal sampling rates in linear FMCW radar.
		Duncan Robertson; R.J.C. Middleton; D.G. Macfarlane University of St Andrews, United Kingdom
		Combinations of high range resolution, long stand-off ranges, and the requirement for moving target indication in LFMCW radars tend to increase the required IF signal sampling rate. A technique using down-conversion by subsampling and aliasing to reduce the required IF sampling rate is demonstrated.
Th-F1.3	11:45	A Comparison of Indoor Channel Measurements and Ray Tracing Simulations at 300 GHz
		Sebastian Priebe Technische Universtität Braunschweig, Institut für Nachrichtentechnik, Germany
		This paper presents ultra broadband channel measurements in a typical office room. The measured channel impulse response and transfer function is compared to the results obtained by a ray tracing simulation. Additionally, we show reflection losses of the building materials in the room.
Th-F1.4	12:00	A 300 GHz 45º Hybrid Coupler for THz Wireless Communications using Subharmonic Mixers
		M.Y.W. Chia; C.K. Ang; E.C.A. Tan; J.J. Yao Institute for Infocomm Research, Singapore
		A 300 GHz hybrid coupler with 45º phase difference for subharmonic mixers in THz transceiver is presented. It consists of a branch-line coupler with a stub loaded phase shifter fabricated with 10 microns tolerances. The magnitude and phase imbalances are less than 0.5dB and 3º from 285 to 325 GHz.
Th-F1.5	12:15	SAFIRE: A real time close range millimetre wave exhibition radar
		David Macfarlane; D.A. Robertson University of St Andrews, United Kingdom
		The MMW Group at St Andrews has constructed a fast scanning, high resolution 94GHz FMCW exhibition radar named SAFIRE. We present operational performance and outline the trade offs between scanning speeds, FMCW sweep times, range resolution, data sampling, processing and display requirements.

	14:00 - 15:30	Thursday Poster	Chiostro

Th-P.01	14:00	A new artists�Ematerials spectroscopic archive in the THz region
		M. Picollo1; C. Cucci1; K. Fukunaga2; M. Mitsuno2; K. Yamamoto3; H. Sotobayashi4 1IFAC-CNR, Italy; 2NICT, Japan; 3Aoyama Gakuin University, Japan; 4Aoyama Gakuin University, Kanagawa, Japan
		In the present communication a new collection of THz spectra of artists�Ematerials along with the definition of procedures followed in preparing the samples and in acquiring the spectra will be presented. In particular, white and blue artists�Epigments in the 0.1-20 THz region will be shown.
Th-P.02	14:00	Terahertz imaging for deterioration detection of East Asian artworks
		Kaori Fukunaga1; Y. Kohdzuma2; M.J. Kim3; Y. Fujii3; Y. Fujiwara3 1NICT, Japan; 2Nara National Research Institute for Cultural Properties, Japan; 3Kyoto University, Japan
		Terahertz imaging was applied to examine East Asian artworks. The reflection image indicates a material map, and detached area is clearly observed as the distribution of air gaps. These results prove that terahertz imaging can be a new diagnosis tool of deterioration of artworks.
Th-P.03	14:00	Studying biodegradation of mosaics using THz and mm-wave radiation
		Alberto Petralia1; V. Surrenti1; G.P. Gallerano1; A. Doria1; E. Giovenale1; G. Messina1; I. Spassovsky1; G. Miceli2; E. Guarneri2; L.M. Vinci2 1ENEA, Italy; 2CRPR, Italy
		We propose a novel diagnostic technique to study the biological degradation of the mosaics in Piazza Armerina (Italy). Starting from an analysis of biological material affecting the mosaics we want to prove the possibility of detecting its presence under the mosaics without removing the tesserae.
Th-P.04	14:00	Examination of pigments by using FT-THz
		K...Y. Yamamoto1; K. Fukunaga2; M. Mizuno2; I. Hosako2; M. Picollo3; H. Sotobayashi1 1Aoyama Gakuin University, Japan; 2National Institute of Information and Communications Technology, Japan; 3Istituto di Fisica Applicata �gNello Carrara�h (IFAC-CNR), Italy
		Terahertz (THz) spectra of Malachite, Which is copper based natural mineral, was measured by a FT-THz in the 3-20 THz region. We observed finger print spectra of the pigment and discuss the influence of grain size of the pigment. The issues of specimen for quantitative analyses are also discussed.
Th-P.05	14:00	An innovative non invasive technique for treatment of works of art. MM and THz waves for diagnostics and conservation
		Bruno Bisceglia1; A. Doria2; G.P. Gallerano2; E. Giovenale2; G. Messina2; A. Petralia2; I. Spassovsky2 1Salerno University - Dept of Information and Electrical Engineering, Italy; 2ENEA, Italy
		A novel non invasive technique and some suitable apparatus for treatment of artworks are introduced. Different phases of any interventions are described, some results are described and discussed. Recent applications on ancient wood artifacts revealed interesting potential future developments for the analysis and complete disinfestations.
Th-P.06	14:00	Millimeter continuous wave imaging for non-destructive investigation of artistic materials
		Emmanuel Abraham1; A. Younus2; S. Salort3; J.P. Caumes3; P. Mounaix1 1CPMOH - Université de Bordeaux, France; 2CPMOH - Université de Bordeaux, Pakistan; 3Alphanov, France
		A monochromatic millimeter wave system coupled with an infrared temperature sensor has been used to investigate pictorial artworks. The flexibility of the system makes it possible to rapidly reveal buried layer information such as a graphite handmade sketch covered by paintings.
Th-P.07	14:00	A Study of TPI of Human Skin under Different Temperature and Humidity
		M.Y. Sy1; Y.T. Zhang1; E. Pickwell-MacPherson2 1The Chinese University of Hong Kong, Hong Kong; 2Hong Kong University of Science and Technology, Hong Kong
		The design of a portable probe in the TPI system by TeraView has improved the flexibility of the TPI system. In this paper we present recent work using the THz probe to measure the skin in different positions on the face and hand on three subjects in vivo under both warm and cold weather
Th-P.08	14:00	Investigation of Pig Ear Skin by IR-Imaging and Far-IR Spectroscopy
		Ole Faurskov Nielsen1; T.M. Greve2; A. Engdahl3 1Department of Chemistry, university of Copenhagen, Denmark; 2LEO-Pharma, Denmark; 3MAX-lab, Sweden
		Synchrotron radiation is used in ATR-Far-IR investigations of pig ear skin. Characteristic protein and water bands are assigned. The results are compared to low-wavenumber Raman spectra. IR-imaging is performed to show the distribution of water, proteins and lipids for pig ear tissue slices.
Th-P.09	14:00	Monitoring of Wound Healing by Millimetre Wave Imaging
		Helmut Essen1; D. Nuessler1; C. Krebs1; J.M. Essen1; A. Hommes1; N. Fatihi1; T. Buzug2 1Fraunhofer FHR, Germany; 2University Lübeck, Germany
		Mm-waves offer the capability to look trough dielectric material. Wound healing processes often have to take place under a cover like a plaster of Paris bandages, which have to be removed for inspection. Investigations were done to evaluate the possibility of wound monitoring through plasters.
Th-P.10	14:00	Multi-objective Experiment using Ultrashort-Pulse Radar System for Breast Cancer Detection
		Zhang Dan Art, Science and Technology Center for Cooperative Research, Kyushu University, Japan
		Experiment of breast cancer detection has been performed using an ultrashort-pulse radar. Breast models for the experiment are made from cooking oil or use a commercial made phatom. We measure reflection data in order to reconstruct images of the breast models with different dielectrics object.
Th-P.11	14:00	Combination treatment of hyperthermia and photodynamic for experimental tumor model using gyrotron (107, 203 GHz)
		N. Miyoshi; I. Hidehara National University of Fukui, Japan
		We applied the combination therapy of the hyperthermia treatment using gyrotron and the photodynamic treatment (PDT) with a photosensitizer and laser irradiated the experimental tumor model. It was very good treatment effect although reducing the dose of the gyrotron.
Th-P.12	14:00	A THz imaging Fourier Transform Spectrometer (FTS) as a potential diagnostic for tissue damage and healing.
		Carole Tucker1; P.A.R. Ade1; D. Naylor2; K. Curtis1 1Cardiff University, United Kingdom; 2University of Lethbridge, Canada
		We present spectral data and derive optical constants for a range of tissues across the Thz range. We make use of the collagen absorption feature at ~11Thz to present the imminent possibility of using an imaging Fourier Transform Spectrometer (FTS) as a diagnostic tool for tissue damage and repair.
Th-P.13	14:00	Facing the challenge of biosample imaging by FTIR with a synchrotron radiation source
		M. Cestelli Guidi1; C. Petibois2; M. Piccinini3; A. Marcelli1 1INFN Laboratori Nazionali di Frascati, Via E. Fermi 40, 00044 Frascati (RM), Italy; 2Université de Bordeaux 2, CNRS UMR 5248 CBMN, B8 Avenue des facultés, F-33405, France; 3Porto Conte Ricerche, SP 55, Porto Conte, Capo Caccia, km 8400, 07041 Alghero (SS), Italy
		FTIR synchrotron radiation microspectroscopy is a powerful molecular probe of biological samples at cellular resolution. Here it is discussed how an optimized combination of IR instrumentation (FPA detectors) and SR optical systems could reach the expected advantages of a SR-based system.
Th-P.14	14:00	Synchrotron Infrared Microspectroscopy at beamline 73 MAX-lab, Lund, Sweden.
		A. Engdahl MAX-lab, Lund University, Sweden
		The infrared beamline at MAX-lab in Lund is equipped with a Bruker Hyperion 3000 microscope combined with an IFS/66v FTIR instrument. In combination with a number of different detectors and objectives this makes it possible to study a large number of different samples.
Th-P.15	14:00	Dielectric Properties of a Molecularly Thin Water Layer in THz Frequency Range
		G.S. Park1; S.J. Chang1; D.H. Choi1; H.R. Park2; D.S. Kim2; W.H. Jhe3 1Center for THz-Bio Application Systems, Department of Physics and Astronomy, Korea, Republic of; 2Center for Subwavelength Optics, Department of Physics and Astronomy, Korea, Republic of; 3Center for Nano-Liquids, Department of Physics and Astronomy, Korea, Republic of
		We report measurement of a molecularly thin water layer by means of THz time-domain spectroscopy operated under transmission mode. Dielectric properties of capillary-held wetting water between two solid surfaces were measured as a function of the distance between two solid surfaces.
Th-P.16	14:00	Solvation water of biomolecules seen through THz glasses
		M. Heyden; B. Born; M. Havenith Ruhr-University Bochum, Germany
		The THz absorption of the intermolecular vibrational modes of the hydrogen bond network of water has recently been found to define a dynamical solvation shell around solutes that extends beyond the first hydration layer. Here we study its properties using molecular dynamics simulations.
Th-P.17	14:00	High Sensitivity of the Sensing Technique using Metal Mesh Devices
		Takashi Kondo1; K. Takigawa1; S. Kamba1; Y. Ogawa2 1Murata Manufacturing Company, Ltd., Japan; 2Graduate School of Agriculture, Kyoto University, Japan
		Metal mesh devices working on higher frequency were examined for detecting the small amounts of a substance. The results indicated that the sensitivity working at 10THz is 50 times the height of that working at 1THz.
Th-P.18	14:00	Terahertz Time-Domain Spectroscopy (THz-TDS) Approach To the Quality Control on Pharmaceutical Products
		Seizi Nishizawa Advanced Infrared Spectroscopy Co., LTD., Japan
		Terahertz time-domain spectroscopy technique has recently been in progress with advantages over other conventional techniques and with a wide range of industrial applications. One of the latest industrial applications focusing on the quality control on pharmaceutical products will be described.
Th-P.19	14:00	Terahertz Spectral Measurements of a Homologous Organic Series
		C. Russell1; A.D. Burnett1; J.E. Cunningham1; A.R. Pearson2; E.H. Linfield1; A.G. Davies1 1School of Electrical and Electronic Engineering, University of Leeds, United Kingdom; 2Astbury Centre for Structural Molecular Biology, University of Leeds, United Kingdom
		We have studied the terahertz frequency spectra of a homologous organic series to investigate how a systematic molecular change directly affects the spectral modes. The spectra overall show similar absorption features, with the modes shifting to lower frequencies as the molecular mass increases
Th-P.20	14:00	Millimeter Wave Spectroscopy of Glucose and a Calcium-binding protein using a Vector Network Analyzer
		K. Shala; B. Yang; T.T. To; R.W. Pickersgill; N. Krauss; R.S. Donnan Queen Marry, University of London, United Kingdom
		Abstract—A Millimeter wave vector network analyzer is used to analyze pectate lyase and different concentration glucose solutions. Data reveal concentration–dependant spectra for glucose and Ca2+-sensitive spectra for pectate lyase.
Th-P.21	14:00	Characterization of Absorption Spectrum of Ethanol Gas for Use as Terahertz Alcohol Sensor
		Junichi Hamazaki; S. Saito; I. Hosako National Institute of Information and Communications Technology, Japan
		The absorption spectra of pure ethanol gas and ethanol gas mixed with air were characterized to examine the use of ethanol gas as a terahertz alcohol sensor. A comparison of the spectra of both gases showed that the absorbance of the latter gas was ~1.3 times greater than that of the former gas.
Th-P.22	14:00	Terahertz Spectroscopy of Ascorbic Acid Oxidase in Aqueous Solutions
		Christopher Que1; A. Ramundo-Orlando2; K. Yamamoto1; M. Tani1 1Research Center for Development of Far-Infrared Region, University of Fukui, Japan; 2Institute of Neurobiology and Molecular Medicine, Consiglio Nazionale delle Ricerche, Italy
		In this study, pure water or guanidine hydrochloride solution was added to ascorbic acid oxidase to obtain its native and denatured form, respectively. Results show that both native and denatured AAO in solution absorb THz weakly, though the denatured solution showed a higher absorbance.
Th-P.23	14:00	An Isolated Dual-Mode Converter for Dual-Channel Rotary Joint
		Nai-Ching Chen1; C.T. Wu1; C.Y. Yang2; T.H. Chang1 1Physics Department, National Tsing Hua University, Taiwan; 2Electronic Systems Research Division, Chung-Shan Institute of Science and Technology, Taiwan
		This study proposes a dual-mode converter for coupling the TE01 and TM01 modes in a circular waveguide. A pair of this converter could be connected with bearing and achieve a high isolation, broadband, dual-channel rotary joint for radar or satellite system.
Th-P.24	14:00	Extremely Wideband Multipath Propagation channel from 285 to 325 GHz for a typical desk-top environment
		M.Y.W. Chia; B. Luo; C.K. Ang Institute for Infocomm Research, Singapore
		Propagation study over 285 GHz to 325 GHz for extremely wideband channel in high speed wireless communication will be presented. The Thz channel is measured in clutter conditions typically of office desktop environment. Measurements and path loss models of the multipath channel will be discussed
Th-P.26	14:00	THz communication with a Quantum Cascade Laser source and a Hot Electron Bolometer detector
		A. El Fatimy1; Francesco Palma2; F.T. Teppe3; J.X. Xu4; J.V. Vachtomin5; A.T. Tredicucci4; G.G. Goltsman5; W.K. Knap3 1CNRS, Universitè Montpellier 2 (France), France; 2NTT New Tera Technology s.r.l., Italy; 3CNRS, Universitè Montpellier 2, France; 4NEST, CNR-INFM and Scuola Normale Superiore di Pisa, Italy; 5Moscow State Pedagogical University, Russian Federation
		We present the experimental study of the direct emission/detection system based on the THz Quantum Cascade Laser as a source and Hot Electron Bolometer (HEB) detector-in view of its application as an optical communication system. We show that the system can efficiently transmit the QCL THz pulses.
Th-P.27	14:00	Simulation of a Ka-band “chebyshev” traveling wave tube on coupled cavity chain
		Dmitrij Komarov1; S.P. Morev2 1Federal State Unitary Enterprise “Research and Production Corporation “Toriy”, Russian Federation; 2Federal State Unitary Enterprise “Research and Production Corporation “Toriy”,, Russian Federation
		Abstract: The simulation’s results of the Ka-band TWT with high electronic efficiency (~20%), the gain coefficient (~50dB) and a broad band operating frequency are presented.
Th-P.28	14:00	A 0.25μm SiGe Millimeter-wave Damping Pulse Transmitter Chip with On-chip Loop Antenna Array
		Nguyen Khanh1; M. Sasaki2; K. Asada1 1The Univ. of Tokyo, Japan; 2VDEC, Japan
		The paper presents a 100GHz - 120GHz pulse transmitter chip with a 54x24 on-chip loop antenna array for in-door millimeter wave (mm-wave) imaging applications. This 4mmx4mm transmitter for beam-forming purpose is designed and fabricated in 2.5V 0.25μm 4-metal layer SiGe BiCMOS technology.
Th-P.29	14:00	Terahertz Spectroscopy of Heavy and Superheavy Water Vapors
		S.S. Nabiev1; V.L. Vaks2; E.G. Domracheva2; L.A. Palkina1; E.A. Sobakinskaya2; M.B. Chernyaeva2 1Russian Research Centre “Kurchatov Institute”, Russian Federation; 2Institute for Physics of Microstructures RAS, Russian Federation
		The paper reports on preliminary results of a study into a possibility of developing a fast method of atmospheric air analysis for the purpose of determination of the isotope composition of water vapors (H2 18O, HD16O, HTO) with the method of non-stationary terahertz (THz) range spectroscopy.
Th-P.31	14:00	5-fold helically corrugated waveguide dispersion measurements
		K. Ronald1; S.V. Samsonov2; M. McStravick1; S.V. Mishakin2; W. He1; G.G. Denisov2; C.G. Whyte1; V.L. Bratman2; A.W. Cross1; N.G. Kolganov2; A.R. Young1; A.D.R. Phelps1; C.W. Robertson1; P. MacInnes1 1SUPA, Department of Physics, University of Strathclyde, Glasgow, United Kingdom; 2Institute of Applied Physics, Russian Academy of Sciences, Nizhny Novgorod, Russian Federation
		Waveguide for microwave propagation with a 5-fold helical corrugation of the inner surface has the desirable properties of optimized dispersion, operation far from cut-off and high-breakdown electromagnetic field strength. This makes it an excellent medium for sweep-frequency pulse compression.
Th-P.32	14:00	Utilizing parallel plate waveguide modes for terahertz sensing
		F. Kernan; M. Wachsmuth; J.A. Higgins; B. Pejcinovic; L. Zurk; R. Campbell Portland State University, United States
		Parallel-plate waveguide sensors are investigated by characterizing TM and TE modes when filled with inhomogeneous and homogeneous samples. Effects of multi-mode TE propagation within PPW and radiation patterns are investigated. Lactose detection is demonstrated by TDS and CW-VNA techniques.
Th-P.33	14:00	Active MMW/Terahertz Imaging for Security
		Igor Minin Novosibirsk State Technical University, Russian Federation
		The project an active MMW/THz imaging system for remote detection of explosives and biological agents carried by a distant person are described.
Th-P.34	14:00	Influence of phlegmatization on spectra of explosives in THz range
		M. Szustakowski; N. Palka; P. Zagrajek; W.M. Ciurapinski Military University of Technology, Poland
		We report on influence of phlegmatization of RDX and HMX on their spectra in 0.5-5.0 THz range. Measurements were carried out by means of Fourier Transform Spectrometry. Increase in attenuation is observed.
Th-P.35	14:00	Spectral sampling method for identification explosives
		M. Szustakowski; M. Piszczek; R. Ryniec Military University of Technology, Poland
		Technological capabilities are not mature enough to analyze a wide THz range. It is however possible to develop narrow-band cascade lasers for this band. In this paper, a new concept of compounds identification, which bases on 14-subspectral definite (theoretical) THz detectors, is presented.
Th-P.36	14:00	Concept of infrared sensor module for sniper detection system
		M. Kastek; R. Dulski; P. Trzaskawka; T. Sosnowski; H. Madura Military University of Technology, Poland
		The paper discusses technical possibilities to build system for sniper detection using infrared cameras. Concept of infrared sensor module for sniper activities detection was presented. The simulation of sniper detection ranges was done.
Th-P.37	14:00	Design Studies of a 100 kW, 60 GHz CW Gyrotron for Plasma Diagnostics
		Machavaram Kartikeyan1; R.J. Jain2 1IIT Roorkee, India; 2Indian Institute of Technology Roorkee, India
		This paper presents the design studies of a 60 GHz conventional cavity gyrotron, designed for the plasma diagnostics for an experimental Tokamak in India. Mode selection procedure has been carried out.
Th-P.38	14:00	Collective Thomson Scattering on FTU using a new ECRH launcher
		G. Grossetti1; A. Bruschi1; G. Granucci1; G. Grosso1; L. Lubyako2; V. Muzzini1; F.P. Orsitto3; U. Tartari1; A. Moro4 1IFP-CNR, Italy; 2IAP, Russian Federation; 3ENEA, Italy; 4IFP - CNR, Italy
		The past measurements carried out with the CTS diagnostic presently installed at FTU showed that a different and more flexible CTS geometry was required to overcome the problem of back reflections. A solution is given by the new ECRH launcher which will be installed at FTU.
Th-P.39	14:00	Differential-phase Reflectometry using Phased-array Antenna System in QUEST
		K. Nagata1; H. Idei2; M. Sakaguchi1; K. Dono1; Y. Wataya1; S. Kawasaki2; H. Zushi2; K. Hanada2; K. Nakamura2; M. Sakamoto2; M. Hasegawa2; Y. Higashizono2; Y. Takase3; T. Maekawa4; O. Mitarai5; Y. Kishimoto4; H. Nakashima2; A. Higashijima2 1Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Japan; 2Research Institute for Applied Mechanics, Kyushu Univ., Japan; 3Department of Complexity Sci. and Eng., Univ. of Tokyo, Japan; 4Inst. of Industrial Sci. and Tech. Research, Tokai Univ., Japan; 5Graduate School of Energy Science, Kyoto Univ., Japan
		The differential-phase reflectometry has been developed to measure the density profile evolution, concerning electron Bernstein Wave (EBW) heating and current drive in the QUEST. The Phased Array Antenna (PAA) system was proposed for the reflectometry to improve the ratio of signal to noise.
Th-P.40	14:00	Terahertz radiation in an optical-field-induced ionization in air with a pulsed electrostatic field
		T.H. Higashiguchi1; Takeshi Higashiguchi1; T.O. Otsuka2; N.Y. Yugami2; R.K. Kodama3 1Ursunomiya University, Japan; 2Utsunomiya University, Japan; 3Osaka University, Japan
		We have demonstrated that the THz radiation can be generate by the burst current induced an optical-field-induced ionization. The central frequencies of the radiation are observed to be 0.12 - 0.15 and 0.04- 0.05 THz at the pulse durations of 100 and 300 fs (FWHM).
Th-P.41	14:00	Experimental observation of frequency up conversion of terahertz using laser produced plasmas
		T.O. Otsuka1; F.S. Suzuki1; M.N. Nakata1; T.H. Higashiguchi1; N.Y. Yugami1; R.K. Kodama2 1Utsunomiya University, Japan; 2Osaka University, Japan
		We have observed frequency up conversion of terahertz radiation using a laser produced plasma. In our experiment the integrated power of a terahertz spectrum increased. We have confirmed that converted frequency depends on pumping laser energy i.e. plasma density.
Th-P.42	14:00	Effect of Prepulse on Intense THz Emission from Plasma Induced by Two-Color Laser Pulses
		Yasuo Minami; M.N. Nakajima; T.S. Suemoto Institute for Solid State Physics, The University of Tokyo, Japan
		In THz wave generation in air plasmas induced by laser pulses composed of fundamental and second-harmonic waves, we introduced a prepulse, 0-2 ns before the main pulse. The prepulse suppressed the THz wave generated by the main pulse. We analyzed the suppression factor as a function of time-delay.
Th-P.43	14:00	A laboratory study of mechanisms for auroral kilometric radiation generation
		K. Ronald1; D.C. Speirs1; S.L. McConville1; K.M. Gillespie1; A.D.R. Phelps1; R. Bingham2; A.W. Cross1; C.W. Robertson1; C.G. Whyte1; W. He1; R.A. Cairns3; I. Vorgul3; B.J. Kellett4 1University of Strathclyde, United Kingdom; 2University of Strathclyde & Rutherford Appleton Laboratory, United Kingdom; 3University of St Andrews, United Kingdom; 4Rutherford Appleton Laboratory, United Kingdom
		An experimental simulation of the Earths Auroral Magnetosphere has been created. Experiments have been undertaken to study the processes by which the auroral cyclotron maser emission occurs
Th-P.44	14:00	Diagnosis of Atmospheric Pressure Plasmas by using Terahertz Time-Domain Spectroscopy
		Hideaki Kitahara1; A.A. Ando1; K.K. Kitano1; M.T. Tani2; M.H. Hangyo1; S.H. Hamaguchi1 1Osaka University, Japan; 2University of Fukui, Japan
		A parallel-plate atmospheric plasma generator has been built with the discharge electrodes that behave as a nondispersive terahertz (THz) waveguide for plasma diagnostics based on THz time-domain spectroscopy. An uniform glow-like atmospheric plasma is generated and THz waves propagate as designed.
Th-P.45	14:00	Heating of Si wafer using a sub-THz gyrotron FU CW V as a radiation source
		Toshitaka Idehara1; Y. Urushizaki1; M. Shimizu2 1University of Fukui, Japan; 2Tokyo Electron LTD, Japan
		Heating effect of sub-THz radiation on Si Wafer is studied by using a Gyrotron FU CW V as a sub-THz radiation source. Increasing rate of the temperature is measured for several frequencies between 75 GHz and 200 GHz. The highest increasing rate reaches 55 degree/sec at the frequency of 203.
Th-P.46	14:00	Development of a Compact Sub-Terahertz Second-Harmonic Gyrotron
		Toshitaka Idehara; S.S. Sabchevski University of Fukui, Japan
		A compact sub-THz second harmonic gyrotron with output parameters suitable for various spectroscopic studies is under development now at FIR FU Research Center. Here we present and the results of the initial computer-aided design (CAD) of this novel prospective member of the Gyrotron FU CW series.
Th-P.47	14:00	The contribution of higher-order spatial harmonics in eigenvalues and ohmic losses calculations in coaxial corrugated cavities
		Z.C. Ioannidis1; K. Avramides2; S. Kern3; G.P. Latsas1; I.G. Tigelis1 1University of Athens, Faculty of Physics, Greece; 2National Technical University of Athens, Greece; 3Karlsruhe Institute of Technology (KIT), Institute of Pulsed Power and Microwave Technology (IHM), Germany
		The Spatial Harmonics Method has been used to study TE modes in a coaxial corrugated cavity. A numerical code has been developed to calculate eigenvalues, fields and ohmic losses on the walls. Numerical results are presented to clarify the influence of the higher–order modes to these calculations.
Th-P.48	14:00	Nonlinear Oscillation Behavior of a Gyrotron Traveling-Wave Amplifier
		Y.S. Yeh1; Z.Q. Wu1; J.M. Huang1; J.L. Shiao1; J.N. Jhou1; C.C. Chiu2; T.H. Chang2 1Southern Taiwan University, Taiwan; 2National Tsing Hua University, Taiwan
		Beyond the start-oscillation current of the gyro-TWA, the amplification transits to the nonlinearly driven oscillation where the driven frequency approaches to the start-oscillation frequency. The performance of the gyro-TWA can be enhanced in the nonlinearly driven oscillation.
Th-P.49	14:00	A Cyclotron Autoresonance Maser with a Radial Electrostatic Field
		Y.-.Y. Kong1; S.-.C. Zhang2; H.-.B. Zhang2; Q. Xin2; B. Chai2; Y. Zhang2; Y.-.Y. Kong2 1Institute of Photoelectronics, Southwest Jiaotong University, China; 2Southwest Jiaotong University, China
		Nonlinear simulations show that power of a cyclotron autoresonance maser with a small-orbit relativistic electron beam may be enhanced by an anti-radial electrostatic field or decreased by a radial electrostatic field. Influence of initial parameters is analyzed.
Th-P.50	14:00	Experimental Results of a 0.42 THz Harmonic Gyrotron
		Y.Y. Yan; W.F. Fu; X.L. Li; X.Y. Yuan; S.L. Liu THz Research Center, School of Physical Electronics, University of Electronic Science and Technology, China
		We report primarily results of a 0.42 THz second harmonic gyrotron. In µs pulse length operation at 52kV and 3A, 4.4kW output power have been observed at the TE2,6 mode at 0.423 THz. Modes at fundamental, including the TE0,3 at 0.221 THz and the TE2,3 at 0.216 THz, have output powers up to 20kW.
Th-P.52	14:00	Development of THz Gyrotron FU CW III using a 20 T superconducting magnet
		K. Kosuga1; T. Idehara1; R. Ikeda1; Y. Tatematsu1; I. Ogawa1; S. Mitsudo1; T. Saito1; L. Agusu2; J.C. Mudiganti1; M. Thumm3 1FIR center, Univ. FUKUI, Japan; 2Department of Physics, Haluoleo University, Indonesia; 3Karlsruhe Institute of Thchnology, Association EURATOM-KIT, Institute für hochfrequenztecnik un, Germany
		A Gytrotron FU CW III using a 20 T superconducting magnet has been developed as a radiation source in the THz region. In the first experiment, THz radiation was observed.
Th-P.53	14:00	Development of a sub-THz CW gyrotron for the millimeter wave pulsed ESR spectrometer
		Seitaro Mitsudo; N. Nakagawa; Y. Ohashi; T. Katayama; Y. Tatematsu; I. Ogawa; T. Idehara; T. Saito Research Center for Far-Infrared Region, University of Fukui, Japan
		We have developed a millimeter wave pulsed electron spin resonance (ESR) spectrometer by using a high power radiation source gyrotron. As the high power millimeter wave source, a CW operated sub-THz Gyrotron is constructed. Operating tests of Gyrotron has already carried out successfully.
Th-P.54	14:00	The Design of a ~390 GHz Gyrotron Based on a Cusp Electron Gun
		F. Li; W. He; A.D.R. Phelps; A.W. Cross; C.R. Donaldson; L. Zhang; K. Ronald University of Strathclyde, United Kingdom
		A ~390 GHz harmonic gyrotron based on a cusp electron gun was designed. The cavity has been designed to suspend the competition modes. Power drop and arise of competition modes were found while the beam thickness and beam spread were considered in the 3D MGIC PIC simulation
Th-P.55	14:00	Design of a frequency tunable 0.2 THz Gyrotron-Backward Wave Oscillator
		W.F. Fu; Y.Y. Yan; S.L. Liu THz Research Center, School of Physical Electronics, University of Electronic Science and Technology, China
		The preliminary design of a frequency tunable 0.2 THz gyrotron-BWO is presented. This gyrotron utilizes reflected structure, and simulations show that, the magnetic tuning bandwidth is over 1GHz, while power is over 1 kW, and the voltage tuning bandwidth is over 1GHz, while power is over 2kW.
Th-P.56	14:00	Hydrogen Bonding Networks in Solvent Mixture and their Impact on the Mobility of Molecules as Probed by THz-TDS and NMR spectroscopy
		J.A. Zeitler; R. Li; C. D'Agostino; J.H.P. Collins; E.J.P. Parrott; M.D. Mantle; L.F. Gladden University of Cambridge, United Kingdom
		Both THz-TDS and NMR techniques were employed to study the hydrogen bonding networks formed in 2-propanol/water mixtures. The composition of such solvent mixtures is shown to significantly impact on the mobility of the solute molecules.
Th-P.57	14:00	Comparison of Expressions for Terahertz Generation for Bulk Optical Rectification away from Normal Incidence
		Colin Bleasdale; R.A. Lewis University of Wollongong, Australia
		The purpose of the current work is to compare the expressions derived recently for bulk optical rectification to those already present in the literature at non-normal incidence to reconcile the differences between the expressions in these papers.
Th-P.58	14:00	Exploration of the origin of random error in spectrum intensity measured with THz-TDS
		M. Takeda; S.R. Tripathi; M. Aoki; N. Hiromoto Shizuoka University, Japan
		We examined the correlation between fluctuations of THz-pulse peak intensity and laser power to explore of the origin of random error in spectrum intensity measured with THz-TDS. This result indicates that the fluctuation of laser power will not be a predominant origin of the random error.
Th-P.59	14:00	Free Induction Decay of Ferromagnetic Resonance Observed by Time Domain THz Spectroscopy in Nano-Ferromagnet -GaxFe2-xO3
		M.N. Nakajima; A.N. Namai; S.O. Ohkoshi; T.S. Suemoto The University of Tokyo, Japan
		Radiation of circularly polarized sub-THz wave due to spin precession was observed at room temperature. Nearly perfect conversion of the linear to circular polarized wave was realized around the natural resonances at 102 GHz. ε-type GaxFe2-xO3 are very prospective for magneto-optic devices.
Th-P.60	14:00	The THz Spectra and Analysis of Bi4Ge3O12 Crystal
		Wang Yali1; B.H. Hou2; H.Y. Wang3; G.Z. Zhao3; B.X. Yang1 1 College of Materials Science and Optoelectronic Technology,Graduate University of Chinese Academy o, China; 2 College of Applied Sciences, Beijing University of Technology, China; 3Department of Physics, Capital Normal University, China
		The THz time domain spectra of Bi4Ge3O12 (BGO) crystal were measured. The optical dielectric and power absorption function were obtained. There was one strong absorption band in the range of 1.5-2.3 THz. The absorption and dielectric characters show that the phonon polariton arises in BGO crystal.
Th-P.61	14:00	Time-domain coherent Raman spectroscopy in THz frequency region
		Masakazu Hibi; T. Furuya; C.T. Que; M. Tani Research Center for Development of Far-Infrared Region, University of Fukui, Japan
		Time-domain coherent-Raman spectroscopy in the THz frequency region using a mode-locked femtosecond laser was studied. In this report, we attempted to detect the coherent Raman signal with an improved SNR owing to the averaging effect of the high-repetition frequency femtosecond laser.
Th-P.62	14:00	Terahertz Spectroscopy of Gas Hydrates
		K. Takeya1; I. Kawayama2; H. Murakami2; K. Ohgaki3; M. Tonouchi2 1Japan, Osaka University, Japan; 2Institute of Laser Engineering, Osaka University, Japan; 3Graduate School of Engineering Science, Osaka University, Japan
		A characteristic absorption and the dielectric constants of gas hydrates are determined by terahertz (THz) time domain spectroscopy. THz spectroscopy is a potentially useful technique to study gas hydrates for both fundamental and application.
Th-P.63	14:00	Quantifying consumer perception of foodstuffs using THz spectrometry
		J. Bowen University of Reading, United Kingdom
		We discuss the potential of using THz spectrometry for the direct observation of phase transitions in foodstuffs, with the aim of quantifying consumer perception. Experimental results from phase transitions using a continuous wave spectrometer are reported.
Th-P.64	14:00	Mitigating Scattering Effects in THz-TDS Measurements
		Mayank Kaushik; B.W.H. Ng.; B.M. Fischer; D. Abbott The University of Adelaide, Australia
		Scattering is a major problem in precise measurements of quasi-optical parameters of material samples. In this paper, we review some popular scattering mitigating techniques and propose a novel method that allows calculating true absorption spectra for unknown thickness and granularity of a sample.
Th-P.65	14:00	The Effect of Optical Delay Line on THz Differential Time-Domain Spectroscopy
		Y.G. Loh1; K.W. Moon1; H.W. Han1; I.M. Park2 1POSTECH, Korea, Republic of; 2Ajou University, Korea, Republic of
		The effect of optical delay line on THz differential time-domain spectroscopy (THz-DTDS) was studied, and we found that the optical delay line can significantly distort the THz DTDS signals due to sampling noise in lock-in detection.
Th-P.66	14:00	Analysis of terahertz absorptions of structural isomers of tyrosine using a molecular orbital simulation and mid-infrared absorptions
		Tomoaki Sakamoto1; T. Tanabe2; T. Ohashi2; S. Yamagata2; Y. Oyama2; T. Kawanishi1; Y. Hiyama1 1National Institute of Health Sciences, Japan; 2Tohoku University, Japan
		Differences of terahertz spectral features of tyrosine and its structural isomers were examined. The inter- and intra-molecular absorptions in a terahertz region were calculated by the structural optimization simulation �gGaussian 03�h at B3LYP/6-31G (d) level using the mid-IR absorptions.
Th-P.67	14:00	Absorption Spectroscopy for SiO2 Particles by Using the Coherent Radiation Light Source
		S. Okuda1; T. Takahashi2 1Radiation Research Center/Osaka Prefecture University, Japan; 2KURRI/Kyoto University, Japan
		The coherent transition radiation light source has been established by using a linear accelerator (linac) at Kyoto Universtiy Research Reactor Institute (KURRI). This has been applied to the absorption spectroscopy for SiO2 fine particles at a wavenumber range of 4-12 cm-1
Th-P.68	14:00	A Preliminary Study of Hydrogenation of Oils Using Terahertz Time Domain Spectroscopy
		B.S.Y. Ung; B.W.H. Ng; D. Abbott The University of Adelaide, Australia
		We begin a preliminary investigation to determine the extent at which terahertz time domain spectroscopy is able to detect the hydrogenation of unsaturated fats and oils within a simulated home cooking environment.
Th-P.69	14:00	Electronic States of One-dimensional Ca1-xNaxCo2O4 Probed by IR-THz Spectroscopy
		Akinori Irizawa1; M. Isobe2; R. Kato3; G. Isoyama3 1Organization of Advanced Science and Technology, Kobe University, Japan; 2National Institute for Materials Science, Japan; 3Osaka University, Japan
		We have performed IR-THz spectroscopy on one-dimensional cobalt oxide Ca1-xNaxCo2O4. An insulating reflection in FIR region on CaCo2O4 (x=0) changed to a metallic one on Ca0.5Na0.5Co2O4 (x=0.5). Na substitution for Ca site affected as a hole doping.
Th-P.70	14:00	THz Spectroscopy to derive the optical Constants of Liquids
		Ulrich Schade1; B. Marchetti2; L.S. von Chrzanowski3; J. Beckmann3; A. Röseler1 1HZB, BESSY II, Germany; 2INFN - Roma "Tor Vergata", Italy; 3BAM, Fachgruppe VIII.3, Germany
		THz stand-off detection of explosives and other hazardous liquids in public areas becomes more and more relevant and with it the knowledge of their optical properties. We present here the results of THz transmission spectroscopy measurements of water-ethanol mixtures as a model.
Th-P.71	14:00	Terahertz radiation from coherent antiferromagnetic magnons excited by circularly polarized laser pulses
		Junichi Nishitani; T. Nagashima; M. Hangyo Institute of Laser Engineering, Osaka University, Japan
		We have observed terahertz radiation from coherent antiferromagnetic magnons excited by circularly polarized laser pulses. The polarity of the magnons is reversed by switching the helicity of the circular polarization. Inverse Faraday effect is a possible mechanism of the coherent magnon excitation.
Th-P.72	14:00	Si as an Emissive Optical Medium for the 3-12 ìm Band
		Volodymyr Malyutenko Institute of Semiconductor Physics, Ukraine
		Conventional methods of utilizing Si as light-emitting medium are limited to near-IR band (<2 ìm). Here we summarize our recent studies in silicon structures which efficiently and controllably emit in 3-12 ìm band, including novel device designs for LEDs, optical amplifiers, and radiative coolers
Th-P.73	14:00	A novel fiber-based Terahertz Source
		Y.D. Gong1; G.B. Ren2; H. Dong1; J.H. Teng3 1Institute for Infocomm Research, Singapore; 2Central University for Nationalities, China; 3Institute of Materials Research and Engineering, Singapore
		One kind of novel fiber-based Terahertz source: opt-THz fiber is proposed, it is based on the 2nd order nonlinearity in the poled optical fiber, where optical fiber is used to transmit optical power and distributely generate Terahertz while outside Terahertz fiber is used to transmit Terahertz.
Th-P.74	14:00	Theoretical investigation and modeling of mid-infrared pulse generation in a GaAs crystal using 30 fs pulses from fiber-optical laser
		Anahit Nikoghosyan; D.L. Hovhannisyan; R.M. Martirosyan; A.S. Nikoghosyan; A.A. Hakhoumian; R.M. Laziev; G.D. Hovhannisyan Yerevan State University, Armenia
		The results of the THz radiation generation by 30 fs lasers pulses with the wavelengths of 1.98 and 1.55 ìm in GaAs are presented. The process of mid-infrared pulse generation obtained from spectral filtration of a supercontinuum formed in the pump-pulse spectrum at the output of GaAs is studied
Th-P.75	14:00	Theoretical analysis of conductivity and dielectric attenuations in millimeter-wave helical SWS
		Bao-Liang Hao; M.G. Huang; P.K. Liu; W. Liu Institute of Electronics, Chinese Academy of Sciences, China
		Conductivity and dielectric attenuation in millimeter-wave helical slow-wave structure (SWS) have been analyzed by a stratified dielectric helix tape and a 3D electromagnetic model.
Th-P.76	14:00	Heterodyne Detection of Output of Sub-THz RTD Oscillator Using InP-SBD Detector and RTD Local Oscillator
		K. Karashima; M. Shiraishi; K. Hinata; S. Suzuki; M. Asada Tokyo Institute of Technology, Japan
		We report on detection of output power from an RTD oscillator using a heterodyne receiver composed of an InP-SBD and an RTD local oscillator at around 430 GHz. Spectral linewidth of the RTD oscillators was estimated from the detected signal.
Th-P.77	14:00	Intersubband Cavity Polaritons: The Role of Mirror Dispersion
		M. Zaluzny; W. Zietkowski Inst. of Physics, M. Curie-Sklodowska University, Poland
		We theoretically discuss the influence of cavity mirror dispersion on properties of intersubband-cavity-polaritons (ICPs). We show that it modifies substantially characteristics of the ICPs and should be taken into account modeling infrared light emitters based on ICPs.
Th-P.78	14:00	Continuous-wave terahertz generation using a vertically integrated horn antenna photomixer
		E. Peytavit1; J.F. Lampin1; F. Hindle2; C. Yang2; G. Mouret2 1IEMN CNRS/Univ Lille1, France; 2LPCA UMR CNRS 8101 Université du Littoral Côte d'Opale, France
		A transverse Electromagnetic Horn Antenna is monolithically integrated with a low- temperature-grown GaAs vertical photoconductor forming a vertically integrated photomixer. Continuous-wave terahertz radiation is generated at frequencies up to 3.5 THz with a power level reaching 20 nW around 3 THz.
Th-P.79	14:00	Enhancement Approach of Ray-tracing Algorithm for Propagation prediction at the MM-Wave Band
		Myoung-Won Jung Electronics and Telecommunications Research Institute, Korea, Republic of
		In this paper, we make periodic/random rough surfaces with the KA method and set up the measurement system. After, we compared with simulation and measurement results. Finally, we are proposed enhancement method of ray-tracing algorithm for MM-wave band.
Th-P.80	14:00	Microwave Radiation from a Particle Revolving Along Shifted Equatorial Orbit About a Dielectric Ball
		L.S. Grigoryan; H.F. Khachatryan; S.R. Arzumanyan; M.L. Grigoryan Institute of Applied Problems in Physics, Armenia
		A relativistic electron uniformly rotating along a shifted equatorial orbit about a dielectric ball may generate microwave Cherenkov radiation tens of times more intense as that generated at the revolution in a continuous, infinite and transparent medium.
Th-P.81	14:00	Characterization of Semiconductor Materials as Terahertz Emitters under the Effect of In-Plane Magnetic Field
		K. Radhanpura; R.A. Lewis University of Wollongong, Australia
		The effect of magnetic field on emitted terahertz radiation is useful to determine the mechanism involved for THz generation. Semiconductor materials, which are potential sources of terahertz radiation, have been analyzed under the influence of in-plane magnetic field.
Th-P.82	14:00	Radially-polarized terahertz radiation from relativistic laser plasma of metal foil target
		S.N. Nashima Osaka City University, Japan
		We investigated the radiation distribution and polarization characteristics of terahertz (THz) waves from a Ti foil target that was vertical to the incident plane. We found that the polarization of THz waves that radiated vertically was not linear and the polarizing axis was rotated.
Th-P.83	14:00	Hydrodynamic simulation of heterodyne terahertz detection in a field effect transistor
		C. PALERMO1; H. Marinchio1; G. Sabatini1; P. Ziade1; P. Shiktorov2; E. Starikov2; V. Gruzinskis2; T. Laurent1; P. Nouvel1; J. Torres1; A. Penarier1; S. Blin1; L. Chusseau1; L. Varani1 1Institut d'Electronique du Sud - UMR UM2-CNRS 5214, France; 2Semiconductor Physics Institute, Lithuania
		We propose a hydrodynamic simulation of the heterodyne detection of terahertz signals in a High Electron Mobility Transistor in which the optical beating of two laser beams exciting plasma waves in the channel constitutes the THz local oscillator. We show the efficiency of such a mixer.
Th-P.84	14:00	An In0.23Ga0.77As-based pHEMT-like Planar Gunn Diode Operating at 116 GHz
		Chong Li1; A. Khalid1; L.B. Lok1; N.J. Pilgrim2; M.C. Holland1; G.M. Dunn2; D.R.S. Cumming1 1University of Glasgow, United Kingdom; 2University of Aberdeen, United Kingdom
		An In0.23Ga0.77As-based planar Gunn diode operating in its fundamental transit-time mode of oscillation at 116 GHz is demonstrated. The diode has a pseudomorhpic HEMT-like structure grown on a semi-insulating GaAs substrate. The layer design was assisted by using a drift-diffusion model.
Th-P.85	14:00	Intersubband population inversion and stimulated transitions between Landau levels in resonant tunneling multiple quantum well structures
		Yury Mityagin1; M.P. Telenkov2; P.F. Kartsev3 1P.N.Lebedev Physical Institute, Russian Federation; 2P.N. Lebedev Physical Institute of RAS, Russian Federation; 3National Research Nuclear University (Mephi), Russian Federation
		The possibility is shown to achieve a population inversion in the system of Landau levels in resonant tunneling quantum well structures in a magnetic field. The mechanism allows the wide range tuning of the emitted terahertz frequency by the magnetic field strength variation
Th-P.86	14:00	Solution growth of an organic N-benzyl-2-methyl-4-nitroaniline (BNA) crystal for DFG-THz source
		T. Notake; M. Saito; M. Tang; Y. Wang; H. Minamide; H. Ito RIKEN, Japan
		A monochromatic THz radiation source with broadband tunability utilizing N-benzyl-2-methyl-4-nitroaniline (BNA) crystal has been developed. BNA quality was improved by applying solution growth method instead of melt method. BNA-THz source using difference frequency generation was further optimized.
Th-P.87	14:00	Phase Noise Characteristics of Millimeter Wave Generated by Mach-Zehnder-Modulator-Based Flat Come Generator
		Isao Morohashi1; T. Sakamoto1; H. Sotobayashi2; T. Kawanishi1; I. Hosako1 1Nat. Inst. Information and Communications Tech., Japan; 2Aoyama Gakuin University, Japan
		We demonstrate low phase noise characteristics of millimeter (MM) wave using Mach-Zehnder-modulator-based flat comb generator. MM waves are generated by beating optical two modes extracted from a comb signal. The rms phase noise of the signal measured at 37.5 GHz was 0.02 rad.
Th-P.88	14:00	Theoretical model of a spark-gap for microwave generation
		S. Sytova; V. Tikhomirov Research Institute for Nuclear Problems of Belarusian State University, Belarus
		Theoretical model of a sharpening spark-gap in an arbitrary electrical circuit is proposed. Simulation of operation of a spark-gap in the system including flux compression generator, transformer, explosive wires and microwave backward-wave tube is studied.
Th-P.89	14:00	Generation of shaped terahertz pulses
		S. Vidal; J. Degert; J. Oberle; E. Freysz CPMOH-Université de Bordeaux, France
		Phase-locked THz pulse pairs and tunable narrow-band THz pulses are generated by means of femtosecond optical pulse shaping combined with optical rectification in ZnTe crystal. THz spectra as narrow as 140 GHz and tunable between 0.5 and 2.5 THz are reported.
Th-P.90	14:00	Hydrodynamic study of electronic, optical and thermal excitation of plasma waves in HEMTs
		C. PALERMO1; H. Marinchio1; G. Sabatini1; P. Ziade2; T. Laurent1; P. Shiktorov3; E. Starikov3; V. Gruzinskis3; P. Nouvel1; J. Torres1; A. Penarier1; S. Blin1; L. Chusseau1; L. Varani1 1Institut d'Electronique du Sud - UMR UM2-CNRS 5214, France; 2Laboratoire de Physique Appliquee, Universite Libanaise, Lebanon; 3Semiconductor Physics Institute, Lithuania
		We investigate with an hydrodynamic model the influence of collective plasma modes in a FET channel under different biasing conditions and by considering both cases of external optical and electronic excitations. The spectral density of drain voltage fluctuations is also calculated.
Th-P.91	14:00	Optical Parametric Oscillator for Continuous Wave Terahertz Generation by Optical Heterodyning
		Markku Vainio; M. Siltanen; L. Halonen University of Helsinki, Finland
		New continuous-wave singly resonant optical parametric oscillator (OPO) based on a bulk Bragg grating is presented. The OPO produces two coherent and spatially overlapping near-infrared beams with their frequency difference in the terahertz regime.
Th-P.92	14:00	Terahertz Emission from GaN Epilayers at Lateral Electric Field
		Vadim Shalygin1; L.E. Vorobjev1; D.A. Firsov1; V.Y. Panevin1; A.N. Sofronov1; G.A. Melentyev1; A.V. Antonov2; V.I. Gavrilenko2; S. Suihkonen3; P.T. Törma3; M. Ali3; H. Lipsanen3 1St. Petersburg State Polytechnic University, Russian Federation; 2Institute for Physics of Microstructures, Nizhny Novgorod, Russian Federation; 3Aalto University, School of Science and Technology, Espoo, Finland
		Emission of terahertz radiation from GaN has been observed at electric field exceeding impurity breakdown threshold. Distinctive features of the emission spectra can be assigned to electron transitions between excited and ground states of donors and to hot electron transitions to the donor states.
Th-P.93	14:00	Effect of Unit-Cell on the Electromagnetic Bandgap in the Terahertz Frequency Spectrum
		K.R. Jha1; G. Singh2; G. Singh2 1Shri Mata Vaishno Devi University, India; 2Jaypee University of Information Technology, India
		In this paper, one-dimensional electromagnetic bandgap material (EBG) using Arlon AR 600 (å = 6.0) as a host material with the periodic implantation of air cylinders in it has been analyzed and simulated in the terahertz regime of the electromagnetic spectrum.
Th-P.95	14:00	Rectangular waveguide with low metallic losses on side walls at THz
		Daniel Sánchez-Escuderos; M. Ferrando-Bataller; J.I. Herranz-Herruzo; M. Baquero-Escudero Universidad Politécnica de Valencia, Spain
		A rectangular waveguide for low-loss transmission at THz frequencies is proposed. The waveguide is based on the reflection of the fundamental mode on the side walls. By adding a stratified medium, a low impedance condition is obtained in the inner wall. Attenuation in side walls is eliminated.
Th-P.96	14:00	Evolutionary Algorithms for the Design of Specific Microwave/Millimeter Wave Components
		Kartikeyan Machavaram; D.G. Goel IIT Roorkee, India
		This paper presents the role of Evolutionary Algorithms for the design and optimization of specific microwave/millimeter wave components. For this, we have taken two problems: one is a nonlinear taper for a 1.0-1.3 MW, long-pulse gyrotron operating at 127.5 GHz and another is a compact MSA.
Th-P.97	14:00	Influence of ripple depth on Bandwidth and Center-Frequency Shift of Reflectivity in a Coaxial Bragg Reflector
		Y. Zhang; S.-.C. Zhang; H.-.B. Zhang; Q. Xin; Y.-.Y. Kong; B. Chai Southwest Jiaotong University, China
		Simulation shows substantial influence of the ripple depth on the bandwidth of 3 dB and center-frequency shift of reflectivity in a coaxial Bragg reflector: both are expanded and the center frequency drifts to the lower frequency with the ripple depth increasing.