WIDE RANGE DETECTOR USING PARABOLIC CYLINDRICAL MIRROR FOR THz APPLICATIONS |
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| Authors: | Takanari Yasui Takeshi Ohtsuka Tetsu Suzuki Shigeki Okajima Kazuya Nakayama Mitsuru Tomioka Katsuhiro Kamimura Takeo Namekata Hiroaki Minamide and Hiromasa Ito |
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| Institution: | (1) Department of Mechanical Engineering, Nagaoka University of Technology, 1603-1 Kamitomiok, Nagaoka Niigata 940-2188, Japan;(2) Department Information and Communication Engineering, Sendai National College of Technology, 4-16-1 Chuuou, Ayashi, Aoba-ku, Sendai Miyagi 989-3128, Japan;(3) College of Engineering, Chubu University, Kasugai, Aichi 487-8501, Japan;(4) Hakkai Creates, 2845, Yamato-machi, Kokonoka-machi, Minami Uonuma-gun, Niigata 949-7312, Japan;(5) Tere-Photonics Team, Photodynamics Research Center RIKEN, 519-1399, Aoba, Aramaki Aoba-ku, Sendai Miyagi 980-0845, Japan |
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| Abstract: | A new, wide-band, high-speed and high-sensitivity THz detector has been developed. The prototype detector consists of a parabolic
cylindrical mirror, a long wire antenna and a Schottky barrier diode. Direct detection measurements have shown a stable sensitivity
of 150 ± 50 V/W for 1–2 THz without any adjustments. The long wire antenna was fixed at the focus of parabolic cylindrical
mirror then it has been realized less operation steps, easy coupling to the external THz signals and a dramatic enhancement
in the practicality of this system. The optically polished mirror and frosted surface one showed comparable sensitivities,
thus easy polishing and less cost mirror fabrication can be applied for this system. The radiation pattern showed a maximum
radiation angle of approximately 23° with its dominant main lobe, which was attributed to the wire antenna character and confirmed
good agreements with classical antenna theory. |
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| Keywords: | parabolic mirror THz detector sensitivity radiation pattern |
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