Friday, September 10, 2010

	09:00 - 10:30	Friday Plenary	Aula Magna
		Chair: K. Sakai

PL.11	09:00	Visualization of fusion plasma physics via millimeter wave imaging techniques
		Hyeon Park POSTECH - Center for Fusion Plasma, Korea, Republic of
		Advances in microwave technology and innovative ideas have enabled visualization of complex physics of the magnetic fusion plasmas. ECEI system is a powerful tool for MHD physics in various devices and the potential of the MIR system has been reassessed and a system design for KSTAR is in progress.
PL.12	09:45	Infrared Nanoscopy of Complex Electronic Materials
		Dmitri Basov UCSD, United States
		I will review recent progress in the infrared nanoscopy of correlated electron oxides, graphene and magnetic semiconductors. I will also touch upon instrumental innovations aimed at expanding the frequency range accessible through nanoscopy studies

	11:00 - 12:30	Spectroscopy 3	Aula Magna
		Chair: M. Von Ortenberg

Fr-A1.1	11:00	Optimization of THz Wave Coupling into Samples in DNP/NMR Spectroscopy
		Emilio Nanni; A.B. Barnes; Y. Matsuki; P. Woskov; B. Corzilius; R.G. Griffin; R.J. Temkin Massachusetts Institute of Technology, United States
		A 10 W, 250 GHz gyrotron is used in DNP NMR Spectroscopy. The 250 GHz power must be optimally coupled into the sample. HFSS simulations show that the effective value of B1 in the sample in our experiments is about 11 µT/Watt. Simulations of new designs that increase the B1 value will be presented.
Fr-A1.2	11:30	SubTHz Spectrometer Based on a Radiation Source with Stochastic Phase
		Ekaterina Sobakinskaya; A.L. Pankratov; V.L. Vaks Institute for Physics of Microstructures RAS, Russian Federation
		Principle and modes of operation of subTHz spectrometer with noise source are described.
Fr-A1.3	11:45	Multiple-frequency imaging using a terahertz quantum cascade laser
		N.K. Saat; P. Dean; S.P. Khanna; M. Salih; A.G. Davies; E.H. Linfield School of Electronic and Electrical Engineering, United Kingdom
		We describe multiple-frequency imaging using a tunable THz QCL. The spatial resolution was found to be wavelength independent, which is explained by measurement of the far-field emission profile. Attenuation coefficients of polycrystalline samples were measured, and compared with TDS and FTS
Fr-A1.4	12:00	A New Single Shot Terahertz Time Domain Spectrometer for Rapid Product and Process Control
		Uli Schmidhammer; V. De Waele; P. Jeunesse Laboratoire de Chimie Physique, France
		A new simple time-domain THz spectrometer based on single-shot balanced detection of the electric field is presented. It allows for the recording of the full temporal THz profile at kHz acquisition rates. Its performances are demonstrated by measuring the fast drying process of acetone on Teflon.
Fr-A1.5	12:15	Spatial and Spectral properties of small area THz generation for sub-wavelength microscopy.
		F. Buccheri1; M. Peccianti2; A.C. Busacca1; T. Ozaki3; R. Morandotti3 1University of Palermo, Italy; 2CNR, Italy; 3INRS-EMT, Canada
		A highly localized THz source is a promising candidate for sub-wavelength microscopy, due to its superior radiation power throughput with respect to others near-field techniques. Here, we report on the spatial and the spectral near-field properties of our highly localized THz source.
Fr-A1.6	12:30	Near-field spectra from broadband-infrared nanoscope
		F. Keilmann; S. Amarie Max Planck Institute of Quantum Optics, Germany
		We demonstrate 300 cm-1 wide MIR spectra of single pixels of 20 nm size, by coupling a fiber-laser-powered coherent spectrometer with a standard near-field microscope. Quantitative amplitude and phase spectra of phonon-resonant crystals will be compared with theory.

	11:00 - 12:30	Metamaterial Devices	Aula Minor
		Chair: G. Righini

Fr-B1.1	11:00	Metamaterial-based Broadband Terahertz Modulators
		Sanaz Zarei University of Michigan, United States
		Broadband modulation of propagating terahertz waves at room temperature is demonstrated using subwavelength metallic slit arrays. Our designs enable the modulation of terahertz transmission by at least 55% at the modulation frequency.
Fr-B1.2	11:30	Bandpass Filters in the Terahertz Range based on Al-on-Si Metasurfaces
		Alessandra Di Gaspare1; M. Ortolani2; O. Limaj3; A. Nucara3; S. Lupi3; C. Rizza1; E. Palange1; P. Carelli1 1Dipartimento di Ingegneria Elettrica e dell'Informazione, Università dell'Aquila, Italy; 2CNR - Istituto di Fotonica e Nanotecnologie, Italy; 3Università di Roma “la Sapienza”, Italy
		We present the design, fabrication and experimental test of terahertz bandpass filters made of 2-dimensional arrays of Al slot dipoles on Si substrate. Filters are obtained through an inexpensive process with full freedom of design and can be easily implemented for applications in THz spectroscopy.
Fr-B1.3	11:45	High-Order THz Bandpass Filters Achieved by Multilayer Complementary Metamaterial Structures
		M.L. Lu; W.L. Li; E.R.B. Brown University of California, Santa Barbara, United States
		A high-order, broadband THz bandpass filter is realized by a complementary, multi-layer metamaterial structure. A bandpass filter was designed, fabricated, and tested up to 0.7 THz. The good agreement between experimental results and theoretical prediction validates the proposed filter.
Fr-B1.4	12:00	Ultrabroadband Metamaterial with Full Transmission Control
		J.S. Kyoung1; M.A. Seo1; H.R. Park1; H.S. Kim1; H. Bernien1; S.M. Koo1; B.J. Kim2; J.H. Choe3; Y.H. Ahn4; H.T. Kim2; N.K. Park1; Q. Park3; K.J. Ahn1; D.S. Kim1 1Seoul National University, Korea, Republic of; 2ETRI, Korea, Republic of; 3Korea University, Korea, Republic of; 4Ajou University, Korea, Republic of
		We study log periodic nanoresonators on VO2 thin film, amplifying available dynamic range for extinction and transmission. Over 1,000:1 extinction ratio for the nano-pattern is achieved when the film undergoes insulator-to-metal phase transition, compared with 10:1 ratio for the unpatterned cases.
Fr-B1.5	12:15	Fishnet metamaterials on thin polymer film for terahertz applications
		Patrick Mounaix1; R. Yahiaoui1; H. Němec2; F. Kadlec2; c. Kadlec2; J. Schilling3; M. Bari4 1CPMOH, France; 2Institute of Physics, Academy of Sciences of the Czech Republic, Czech Republic; 3ZIK “SiLi-nano”, Martin-Luther-Universität Halle-Wittenberg, Freiherr-von-Fritsch Str. 3,, Germany; 4Science and Technology Research Partners Ltd,, Ireland
		Double sided photolithography method on ultrathin polymer and a laser micromachining technique were used to fabricate fishnet structures. We performed simulations and experiments by terahertz time domain spectroscopy respectively. The effective parameters were extracted with a single shot approach.
Fr-B1.6	12:30	THz Pulse Propagation through Woven-Steel-Mesh Metamaterials
		H.G. Roskos Johann Wolfgang Goethe University, Physikalisches Institut,, Germany
		We experimentally study single- and multi-layer woven metallic meshes and investigate their pass-band and dispersion characteristics. The structures are commercially available as precisely fabricated chemical particle filters, which facilitates their application as metamaterials.

	11:00 - 12:30	Laser Driven Sources 3	Room 2
		Chair: E. Suvorov

Fr-C1.1	11:00	Ultrabroadband Electric Field Generation and Detection from Far Infrared to Optical Communication Frequency
		Eiichi Matsubara1; M. Bitoh1; H. Shimosato1; M. Ashida2 1Osaka University, Japan; 2Osaka University and PRESTO-JST, Japan
		We generated ultrabroadband coherent infrared wave with a frequency range of 0.1-200 THz using difference frequency generation in crystals of DAST, GaSe, and dipole radiation from a photoconductive antenna. Also we detected the wave by time domain spectroscopy with a photoconductive antenna.
Fr-C1.2	11:30	A Critical Analysis of THz Applications and Compact Device Source Technologies: Challenges and Opportunities, and Common Truths
		Carter Armstrong L-3 Communications Electron Devices, United States
		The results of an analysis of THz applications and source device physics will be presented. This work was performed in support of a government review on Compact THz Sources held in 2007. Challenges and opportunities will be discussed.
Fr-C1.3	11:45	THz Generation in a Photo-Activated Periodically-Biased Semiconductor
		Joseph Penano1; P. Sprangle1; D. Gordon1; B. Hafizi2; A. Zigler2 1Naval Research Laboratory, United States; 2Icarus Research, Inc., United States
		A high-intensity short laser pulse, propagating obliquely to the surface of a periodically biased semiconductor array can photo-ionize the medium and generate a periodic current density. The transient current density can be a source of THz radiation over a wide frequency range.
Fr-C1.4	12:00	Control of Terahertz Wave Front using Arrayed Terahertz Emission Device
		K. Beppu; T. Sugimoto; T. Kiwa; K. Tsukada Okayama university, Japan
		Arrayed THz emission device was proposed to control the wave front of THz. The simulation results indicated the THz wave front can be tilted by changing the emission pattern of the device. The 4×4 arrayed device was fabricated and the emission pattern could be controlled by the bias voltages.
Fr-C1.5	12:15	Improved Performance of GaAs-based Terahertz Emitters
		C. Headley1; L. Fu2; P. Parkinson1; X. Xu1; J. Lloyd-Hughes1; C. Jagadish2; M.B. Johnston1 1Department of Physics, University of Oxford, United Kingdom; 2Research School of Physics and Engineering, Australian National University, Australia
		We have improved the stability and performance of terahertz photoconductive (Auston) switches using a combination of (NH4)2S surface passivation and silicon nitride (Si3N4) encapsulation. The passivation and encapsulation processes increased the average terahertz power generated four-fold.
Fr-C1.6	12:30	The Study on the Interaction between Mimicking Surface Plasmon and two-Electron beam in the 3-mirror quasi-optical Cavity
		Y.X. Zhang; M. Hu; P. Zhang; S.G. Liu Terahertz Research Centre, University of Electron Science and Technology of China, China
		Mimicking surface plasmons can be used to interact with two-electron beam to generate THz radiation. And the 3-mirror quasi-optical cavity has high Q and can collect the radiation energy efficiently, so the interaction in such special cavity may be a good way to generate THz.

	11:00 - 12:30	Biology 4	Room 3
		Chair: A. Markels

Fr-D1.1	11:00	Chemical microscopy and nanoscopy of bio-materials and living cells
		E. Bruendermann; D.A. Schmidt; I. Kopf; K. Meister; M. Filimon; M. Havenith Ruhr-University Bochum, Germany
		Raman microspectroscopy of human sperm cells and nearfield infrared microscopy of nanoscale biomaterials like nanografted DNA have been performed. A newly developed station for the ANKA-IR2 beamline combines several techniques to study the same sample at the same position.
Fr-D1.2	11:30	Terahertz time-domain spectroscopy on proteins, peptides, and small biological molecules
		Keisuke Tominaga; A. Kaneko; O. Kambara; F. Zhang; A. Tamura Kobe University, Japan
		Absorption coefficients and refractive indices of biologically important macromolecules such as myoglobin and small molecules such as adenosine triphosphate have been obtained in the low-frequency region by terahertz time-domain spectroscopy to understand molecular dynamics and interactions.
Fr-D1.3	11:45	Terahertz Time Domain Spectroscopy of Protein Single Crystals
		Katarzyna Tych1; A.D. Burnett1; C.D. Wood1; J.E. Cunningham1; A.R. Pearson2; E.H. Linfield1; A.G. Davies1 1School Electronic and Electrical Engineering, University of Leeds, United Kingdom; 2Astbury Centre for Structural Molecular Biology, University of Leeds, United Kingdom
		Broadband time-domain spectroscopy has been used to measure the terahertz absorption of single crystal proteins. A dehydration study of a single crystal of tetragonal hen egg-white lysozyme is presented as a proof of concept.
Fr-D1.4	12:00	Using Rattling Ions to Probe sub-ps Water Network Dynamics
		D.A. Schmidt1; Ö. Birer2; S. Funkner1; B.P. Born1; R. Gnanasekaran3; G.W. Schwaab1; D.M. Leitner3; M. Havenith1 1Department of Physical Chemistry II, Ruhr-University Bochum, Germany; 2Department of Physical Chemistry II, Ruhr-University Bochum; Present Address: Department of Chemistr, Turkey; 3Department of Chemistry, University of Nevada, United States
		We present THz measurements on fifteen solvated alkali halide salts using narrow band THz absorption and broad band THz Fourier transform spectroscopies in order to shed new light on the controversy of salts as kosmotropes (structure maker) or chaotropes (structure breaker).
Fr-D1.5	12:15	Terahertz spectroscopy of liquid water in frozen biological samples
		Hiromichi Hoshina1; A. Hayashi1; S. Ueno2; Y. Ogawa3; C. Otani1 1RIKEN Advanced Science Institute, Japan; 2Tohoku University, Japan; 3Kyoto University, Japan
		Terahertz transmission spectra of frozen gelatin solution were measured. The observed spectrum shows that the scattering of ice crystal is negligibly small. The absorbance of liquid water in the sample was confirmed by subtracting those of ice and freeze dried gelatin from the observed spectrum.

	11:00 - 12:30	Plasma heating and diagnostics	Room 7
		Chair: K. Sakamoto

Fr-E1.1	11:00	Utilization of collinear ECE detection/ECRH heating for active stabilization of plasma instabilities
		Waldo Bongers FOM institute for plasma physics Rijnhuizen, Netherlands
		On TEXTOR proof of principle was demonstrated of using ECE measured along the QO ECRH line-of-sight for MHD control. Progress of such a system on ASDEX-Upgrade, based on waveguides equipped with FADIS as diplexer in combination with an additional Mach-Zehnder–type absorptive filter, is presented.
Fr-E1.2	11:30	Electron Bernstein Wave Emission Diagnostics using Phased-array Antenna System in QUEST
		Hiroshi Idei Kyushu University, Japan
		The phased-array antenna has been developed for EBW emission diagnostics. The measured fields were in excellent agreements with those evaluated from the Kirchhoff integral. The broadband orthomode transducer was also developed to measure the wave polarization of the EBW emission.
Fr-E1.3	12:00	Terahertz scattering technique for measuring decay of plasma filament
		S.B. Bodrov; A.A. Murzanev; M.V. Tsarev; A.N. Stepanov Institute of Applied Physics of Russian Academy of Sciences, Russian Federation
		Terahertz scattering technique was proposed and used for investigation of dynamics of plasma density in a filament formed in air by femtosecond laser pulses. Two orders of magnitude for 2 ns decay of plasma density were obtained. The kinetic processes responsible for such a fast decay are discussed.
Fr-E1.4	12:15	Generation of Submillimeter Radiation by Strong Plasma Turbulence at Electron Beam – Plasma Interaction
		A.V. Arzhannikov1; A.V. Burdakov2; S.A. Kuznetsov2; M.A. Makarov2; K.I. Mekler2; V.V. Postupaev2; A.F. Rovenskikh2; V.F. Sklyarov2; S.L. Sinitsky2 1Budker Institute of Nuclear Physics and Novosibirsk State University, Russian Federation; 2Budker Institute of Nuclear Physics SB RAS, Russian Federation
		The paper presents the results of the experimental investigation of the process of conversion of two Langmuir oscillations in one electromagnetic wave with the frequency twice as large as the plasma Langmuir frequency.

	11:00 - 12:30	Security and Stand-off Detection	Room 11
		Chair: I. Duling

Fr-F1.1	11:00	Terahertz radar cross section measurements
		Krzysztof Iwaszczuk1; H. Heiselberg2; P.U. Jepsen1 1DTU FOTONIK – Department of Photonics Engineering, Technical University of Denmark, Denmark; 2Danish Defense Acquisition & Logistics Organization, Denmark
		We present the result of terahertz radar cross section measurements on various objects including models of aircraft fighters. Application of a time domain system provides both values of radar cross section and ranging information.
Fr-F1.2	11:30	Hilbert spectroscopy for security screening of liquids
		Yuriy Divin1; M. Lyatti1; V. Pavlovskiy2; u. Poppe1; K. Urban1 1Forschungszentrum Juelich, Germany; 2Institute of Radio Engineering and Electronics RAS, Russian Federation
		To distinguish between liquids in security screening, we have applied Hilbert spectroscopy and high-Tc Josephson detectors. Compact set-ups have been developed and reflection spectra of various liquids in bottles have been measured in the spectral range of 15 - 400 GHz with scanning time of 0.2 s.
Fr-F1.3	11:45	An experimental 210 GHz radar system for 3D stand-off detection
		Jan Svedin1; S. Rudner1; G. Thordarsson2; N. Wadefalk3; S.E. Gunnarsson3; M. Abbasi3; H. Zirath3; J. Stake3; T. Bryllert3; J. Vukusic3 1FOI, Sweden; 2SAAB Electronic Defense Systems, Sweden; 3Chalmers University of Technology, Sweden
		A 210 GHz radar system for studies of person scanning at stand-off distances is presented. The radar uses a mechanically scanned RX front-end based on an antenna-integrated MMIC. The TX part is based on an HBV quintupler. Image data compression is made using the FMCW and SAR principles.
Fr-F1.4	12:00	Development of THz Gyrotrons with Pulse Solenoids for Detecting Concealed Radioactive Materials
		Gregory Nusinovich1; R. Pu1; T.M. Antonsen1; O.V. Sinitsyn1; J. Rodgers1; V.L. Granatstein1; A. Mohamed1; J. Silverman1; M. Al-Sheikhly1; Y.S. Dimant2 1University of Maryland, United States; 2Boston University, United States
		The detection concept is based on focusing high-power THz wave beams generated by compact gyrotrons in small spots where the breakdown can be initiated. Results of the study of air ionization by concealed radioactive materials and design data of a 670 GHz gyrotron are reported.
Fr-F1.5	12:15	SubTHz and FTIR Spectroscopy of Explosive Vapors.
		E.A. Sobakinskaya1; V.L. Vaks1; S.S. Nabiev2; D.B. Stavrovskii3 1Institute for Physics of Microstructures RAS, Russian Federation; 2Russian Research Centre “Kurchatov Institute, Russian Federation; 3A.M.Prokhorov General Physics Institute RAS, Russian Federation
		Discussed are experimental results of subTHz vapor phase spectroscopy over solid samples of explosives, such as commercial trinitrotoluene (TNT), nitroglycerine (NG) and cyclonite (RDX).