Ambient-temperature operation of nonequilibrium magnetoconcentration infrared detectors in InSb and HgCdTe

2002 23rd International Conference on Microelectronics. Proceedings (Cat. No.02TH8595) Pub Date : 2002-08-07 DOI:10.1109/MIEL.2002.1003196

Z. Jakšić, Z. Djuric, O. Jakšić, V. Jovic, Z. Djinovic

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Abstract

We present a theoretical and experimental consideration of magnetoconcentration-based long-wavelength infrared photodetectors with nonequilibrium Auger-process suppression, designed for room-temperature operation. Our analysis includes the design, modeling and optimization of the detectors, their experimental fabrication and characterization. We used two narrow-bandgap direct semiconductors for our devices, indium antimonide (InSb) and mercury cadmium telluride (HgCdTe). We investigated all of the main properties of our detectors, including current-voltage characteristics, sensitivity, spectral noise, specific detectivity (D*) and response time. In our calculations we used our generalized expression for the absorption coefficient of HgCdTe that takes into account the influence of non-quantizing magnetic fields. Our experiments included more than a hundred magnetoconcentration devices. Thermal noise was decreased, specific detectivity increased and overall performance improved in most of our photodetectors.

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InSb和HgCdTe中非平衡磁浓度红外探测器的室温运行

我们提出了一种基于磁浓度的非平衡俄格过程抑制长波红外探测器的理论和实验考虑，设计用于室温操作。我们的分析包括探测器的设计，建模和优化，它们的实验制作和表征。我们的器件使用了两种窄带隙直接半导体，锑化铟(InSb)和碲化汞镉(HgCdTe)。我们研究了探测器的所有主要特性，包括电流-电压特性、灵敏度、光谱噪声、比探测率(D*)和响应时间。在我们的计算中，我们使用了考虑非量子化磁场影响的HgCdTe吸收系数的广义表达式。我们的实验包括一百多个磁浓缩装置。在我们的大多数光电探测器中，热噪声降低了，比探测率提高了，总体性能提高了。

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2002 23rd International Conference on Microelectronics. Proceedings (Cat. No.02TH8595)

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