Lateral photocurrent spreading in single quantum well infrared photodetectors

被引：8
|
作者：
Ershov, M [1 ]
机构：
[1] Univ Aizu, Dept Comp Software, Aizu Wakamatsu 9658580, Japan
来源：
APPLIED PHYSICS LETTERS | 1998年 / 72卷 / 22期
关键词：
D O I：
10.1063/1.121481
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Lateral physical effects in single quantum well infrared photoeletectors (SQWIPs) under nonuniform illumination over the detector area are considered. These effects are due mainly to the in-plane transport of the photoinduced charge in the QW. The length of the lateral photocurrent spreading is determined by the in-plane conductivity of the carriers in the QW and characteristic time of the QW recharging, and can be as large as 10(1)-10(4) mu m. Closed-form analytical expressions for SQWIP responsivity for modulated infrared signal and modulation transfer function are obtained. Possible techniques to suppress lateral photocurrent spreading are discussed. (C) 1998 American Institute of Physics.
引用
收藏
页码：2865 / 2867
页数：3
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