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NOVEL TERAHERTZ PHOTOCONDUCTIVE ANTENNAS |
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| Authors: | Masahiko Tani Yuichi Hirota Christopher T. Que Shigehisa Tanaka Ryo Hattori Mariko Yamaguchi Seizi Nishizawa Masanori Hangyo |
| Affiliation: | (1) Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka 565-0871, Japan;(2) Central Research Laboratory, Hitachi Ltd, 1-280, Higashi-koigakubo, Kokubunji-shi, Tokyo 185-8601, Japan;(3) Advanced Technology R&D Center, Mitsubishi Electric Corp., 8-1-1 Tsukaguchi-honmachi, Amagasaki 661-8661, Japan;(4) Aispec: Advanced Infrared Spectroscopy Co., Ltd., 3-17-16 Sen-nin-cho, Hachioji, Tokyo 193-0835, Japan |
| Abstract: | The photoconductive (PC) antenna is a key device for the recent terahertz (THz) photonics based on laser-pumped generation and detection of THz radiation. In this paper we report on two new types of PC antennas: the Schottky PC antenna and the multi-contacts PC antenna. The former one is able to detect THz radiation intensity without the time-delay scan and useful for applications where spectroscopic information is not important, such as the THz intensity imaging. The latter one is useful for the polarization sensitive THz spectroscopy, such as the THz ellipsometry. The characteristic features of these new types of PC antennas are studied by using a THz time-domain spectroscopy system. |
| Keywords: | Terahertz radiation photoconductive antennas Schottky contact rectification effect multi-contacts polarization modulation |
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