Analytical model of transient photoresponse of quantum well infrared photodetectors

被引：21

作者：

Ershov, M ^{[1
]}

Satou, S

Ikebe, Y

机构：

[1] Georgia State Univ, Dept Phys & Astron, Atlanta, GA 30303 USA

[2] Univ Aizu, Dept Comp Software, Aizu Wakamatsu 9658580, Japan

来源：

JOURNAL OF APPLIED PHYSICS | 1999年 / 86卷 / 11期

关键词：

D O I：

10.1063/1.371716

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

This article presents a theory of the transient photoresponse of quantum well infrared photodetectors (QWIPs). As has been shown recently [M. Ershov, Appl. Phys. Lett. 69, 3480 (1996)], the photocurrent in a QWIP in response to a step-like infrared illumination is composed of fast and slow transients. Analytical models for both fast and slow transients in the linear regime are proposed. The amplitudes and time constants of the transients are expressed in terms of the basic QWIP characteristics - capture time to the QWs, photocurrent gain, and differential conductivity of the emitter contact. Closed-form analytical expressions for the transient photocurrent in the time and frequency domains are obtained. The validity of the proposed analytical model is confirmed by comparison with numerical simulations. (C) 1999 American Institute of Physics. [S0021-8979(99)02323-3].

引用

页码：6442 / 6450

页数：9

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