Inexpensive detector for terahertz imaging

被引：80
|
作者：
Abramovich, A. [1 ]
Kopeika, N. S.
Rozban, D.
Farber, E.
机构：
[1] Ariel Univ Ctr Samaria, Dept Elect & Elect Engn, Ariel, Israel
[2] Ben Gurion Univ Negev, Dept Electroopt Engn, IL-84105 Beer Sheva, Israel
来源：
APPLIED OPTICS | 2007年 / 46卷 / 29期
关键词：
D O I：
10.1364/AO.46.007207
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Glow discharge plasma, derived from direct-current gas breakdown, is investigated in order to realize an inexpensive terahertz (THz) room-temperature detector. Preliminary results for THz radiation show that glow discharge indicator lamps as room-temperature detectors yield good responsivity and noise-equivalent power. Development of a focal plane array (FPA) using such devices as detectors is advantageous since the cost of a glow discharge detector is approximately $0.2-$0.5 per lamp, and the FPA images will be diffraction limited. The detection mechanism of the glow discharge detector is found to be the enhanced diffusion current, which causes the glow discharge detector bias current to decrease when exposed to THz radiation. (C) 2007 Optical Society of America.
引用
收藏
页码：7207 / 7211
页数：5
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