標題: Multicolor infrared detection realized with two distinct superlattices separated by a blocking barrier
作者: Chen, CC
Chen, HC
Kuan, CH
Lin, SD
Lee, CP
電子工程學系及電子研究所
Department of Electronics Engineering and Institute of Electronics
公開日期: 1-Apr-2002
摘要: A multicolor infrared photodetector was realized with two superlattices separated by a blocking barrier. The photoresponse is switchable between 7.5-12 and 6-8.5 mum by the bias polarity, and is also tunable by the bias magnitude in each wavelength regime. In addition, our detector exhibits advantages including little temperature dependence of the spectral response and the same order of responsivity in the two wavelength regimes. The measured peak responsivities in the two regimes are 117 mA/W at 9.8 mum under 1 V and 129 mA/V at 7.4 mum under -0.8 V, respectively. Also, the detectivities are comparable with the conventional multistack detector. The zero background peak detectivities are 2.3x10(10) cm Hz(0.5)/W at 50 K and 9.8 mum under 0.7 V, and 8.7x10(10) cm Hz(0.5)/W at 70 K and 7.4 mum under -0.7 V. (C) 2002 American Institute of Physics.
URI: http://dx.doi.org/10.1063/1.1466537
http://hdl.handle.net/11536/28877
ISSN: 0003-6951
DOI: 10.1063/1.1466537
期刊: APPLIED PHYSICS LETTERS
Volume: 80
Issue: 13
起始頁: 2251
結束頁: 2253
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