Three-element stressed Ge:Ga photoconductor array for the infrared telescope in space.
Three-element stressed Ge:Ga photoconductor array for the infrared telescope in space.
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用于太空红外望远镜的三元件应力 Ge:Ga 光电导阵列。
DOI：
10.1364/ao.31.000460
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发表时间：
1992
期刊：
影响因子：
1.9
通讯作者：
H. Okuda
中科院分区：
文献类型：
--
作者：
N. Hiromoto;T. Itabe;H. Shibai;H. Matsuhara;T. Nakagawa;H. Okuda
制作了一种应用于空间卫星红外望远镜的三元件应力Ge:Ga光导体阵列，并在2.0 K的极低光子流入条件下（~ 10(5)光子/s）进行了实验测试。采用稳定紧凑的锥盘弹簧对3个Ge:Ga探测器串联施加应力。截止波长为~ 180微米。响应度为~ 100 A/W，量子效率与光导增益etaG的乘积为~ 1，斩波频率为2 Hz。当使用低噪声跨阻放大器时，噪声等效功率<5 × 10(-18) W/Hz（(1/2)）。在实验中观察到缓慢的瞬态响应和依赖于背景光子流入的非线性响应。后者表明etaG具有与N(ph)（-(1/2)）成正比的时间常数tau(c)。
A stressed Ge:Ga photoconductor array with three elements applied to the Infrared Telescope in Space satellite was fabricated and tested in experiments at 2.0 K in very low-photon-influx conditions (~ 10(5) photons/s). Stress was applied to three Ge:Ga detectors in a series by a stable and compact stressing apparatus by using cone-disk springs. The cutoff wavelength was ~ 180 microm. Responsivity was ~ 100 A/W, and the product of quantum efficiency and photoconductive gain, etaG, was ~ 1 with a chopping frequency of 2 Hz. The noise equivalent power was <5 x 10(-18) W/Hz((1/2)) when low-noise transimpedance amplifiers were used. A slow transient response and a nonlinear response that was dependent on the background photon influx were observed in the experiments. The latter showed that the etaG had a time constant tau(c) that was proportional to N(ph)(-(1/2)).