TST, Vol. 1, No. 3, PP. 126-135
Far-Infrared and Terahertz Research from 1950 to the present
Kobe Advanced Research Center (KARC)
National Institute of Information and Communications Technology (NICT)
588-2 Iwaoka, Iwaoka-cho, Nishi-ku, Kobe 651-2492, Japan
Tel: +81-78-969-2150 Fax: +81-78-969-2154
E-mail: sakai@nict.go.jp
Abstract：A sequence of research activities in the spectral range between light waves and microwaves carried out at Osaka University and KARC / NICT is described, starting from the times of far-infrared grating spectroscopy through the times of far-infrared Fourier-transform spectroscopy to the present stimulated by the terahertzpulse technology.Activities on terahertz-wave optoelectronics at KARC / NICT and related groups in Japan are an extension of the studies initiated at Osaka University.
Keywords: FIR, FTS, THz.
doi: 10.11906/TST.126-135.2008.09.12
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TST, Vol. 1, No. 3, PP. 136-160
Intense Terahertz Excitation of Semiconductors
S.D. Ganichev
Terahertz Center, University of Regensburg, 93040, Regensburg, Germany
Abstract: The potential of the terahertz spectroscopy at high excitation level is demonstrated on the example of the recently observed new class of spin dependent elects: spin photocurrents. Two electsresponsible for the occurrence of an electric current caused by homogeneous excitation with terahertz radiation and linked to a uniform spin polarization in a QW are reviewed: the circular photogalvanic elect and the spin-galvanic elect. PACS numbers: 73.21.Fg, 72.25.Fe, 78.67.De, 73.63.Hs
Key words: Terahertz，THz spectroscopy
doi: 10.11906/TST.136-160.2008.09.13
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TST, Vol. 1, No. 3, PP. 161-168
Tera-Hz Radiation Source by Deference Frequency Generation (DFG) and TPO with All Solid State Lasers
Jianquan Yao1, Xu Degang2, Sun Bo3 and Liu Huan4
1Institute of Laser & Opto-electronics, 2College of Precision Instrument & Opto-electronic Engineering,
3Tianjin University,4 Tianjin 300072, China
Tel: 86-22-27402416, Fax: 86-22-27406436,
Email: jqyao@tju.edu.cn
Abstract: The terahertz technique has attracted much attention from a variety of applications in fundamental and applied research field, such as physics, chemistry, life sciences, medical imaging, safety inspection, radio astronomy, modern communication, weapon guidance and so on. The technological progress of terahertz radiation source plays an important role in promoting the development of various terahertz technique and the related cross subjects. The generation of high-power, coherent, widely tunable, narrow-band terahertz wave, based on the process of the difference frequency generation [1] and the tera-parametric oscillation [2-5] in a polar crystal respectively, is expected to provide a promising terahertz radiation source with the obvious and exclusive advantages of compactness, simplicity for tuning, operation at room temperature and so on, which causes great research interest among the researchers all over the world. However, the research of this potential THz-wave generation technique is still in its infancy, and few relevant theoretical or experimental studies were reported in recent years.
Keywords: Terahertz，Terahertz radiation source
doi: 10.11906/TST.161-168.2008.09.14
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TST, Vol. 1, No. 3, PP. 169-189
Single-Cavity Gyromultipliers
I.V. Bandurkin*, V.L. Bratman, G.G. Denisov, Yu.K. Kalynov, A.V. Savilov
Institute of Applied Physics, Nizhny Novgorod, Russia
*Tel: +7-831-416-06-37 Fax: +7-831-416-06-16
Email: iluy@appl.sci-nnov.ru
A.W. Cross, W. He, K. Ronald, A.D.R Phelps
SUPA, Department of Physics, University of Strathclyde, Glasgow, G4 0NG, UK
Abstract: Several new configurations of self-exciting gyro-multipliers are proposed. These schemes allow concurrent excitation of radiation at fundamental and harmonic frequencies in a single resonator. It is shown that such an approach simplifies the experimental setup and promises high device efficiency. Experimental proposals based on some of the schemes are presented.
Keywords: Cyclotron resonance masers, Gyrotrons, Frequency multiplication
doi: 10.11906/TST.169-189.2008.09.15
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