Transient photoconductivity in quantum well infrared photodetectors

被引:20
作者
Ershov, M
机构
[1] Univ of Aizu, Aizu-Wakamatsu
关键词
D O I
10.1063/1.117258
中图分类号
O59 [应用物理学];
学科分类号
摘要
Transient photoconductivity in quantum well infrared photodetectors (QWIPs) is studied using numerical modeling. Transient photocurrent in QWIPs illuminated by steplike infrared radiation consists of two components. A fast component, representing the primary photocurrent, is determined by the processes of the carrier capture to the QWs and transit through the QW structure. Its amplitude can be lower than the steady-state photocurrent due to the sweep-out of the photoexcited carriers. A slow component, comprising the multiplied photocurrent, is governed by the recharging of the QWs. The QWIPs can exhibit high photocurrent gain only at frequencies of harmonic infrared radiation lower than the inverse characteristic time of establishing equilibrium at the injecting contact. (C) 1996 American Institute of Physics.
引用
收藏
页码:3480 / 3482
页数:3
相关论文
共 20 条
  • [1] MECHANISM OF PHOTOCURRENT MULTIPLICATION IN AMORPHOUS-SILICON CARBIDE SCHOTTKY CELLS
    AKITA, S
    UEDA, H
    NAKAYAMA, Y
    [J]. JOURNAL OF APPLIED PHYSICS, 1995, 77 (03) : 1120 - 1125
  • [2] ASRYAN LV, 1988, SOV PHYS SEMICOND, V22, P138
  • [3] HIGH-SPEED MEASUREMENT OF THE RESPONSE-TIME OF A GAAS/ALXGA1-XAS MULTIQUANTUM-WELL LONG-WAVELENGTH INFRARED DETECTOR
    BETHEA, CG
    LEVINE, BF
    HASNAIN, G
    WALKER, J
    MALIK, RJ
    [J]. JOURNAL OF APPLIED PHYSICS, 1989, 66 (02) : 963 - 965
  • [4] Bhattacharya P., 1994, SEMICONDUCTOR OPTOEL
  • [5] RESPONSE-TIME MEASUREMENT OF A MID-INFRA-RED PHOTODETECTOR
    DEBARROS, MRX
    BECKER, PC
    MIRANDA, RS
    WEST, LC
    DUNKEL, J
    ROBERTS, CW
    STAYT, JW
    SWAMINATHAN, V
    [J]. ELECTRONICS LETTERS, 1994, 30 (13) : 1093 - 1094
  • [6] Analysis of the transport mechanism in GaAs/AlGaAs quantum-well infrared photodetection structures using time resolved photocurrent measurements
    Ehret, S
    Schneider, H
    Schonbein, C
    Bihlmann, G
    Fleissner, J
    [J]. APPLIED PHYSICS LETTERS, 1996, 69 (07) : 931 - 933
  • [7] CONTACT AND DISTRIBUTED EFFECTS IN QUANTUM-WELL INFRARED PHOTODETECTORS
    ERSHOV, M
    RYZHII, V
    HAMAGUCHI, C
    [J]. APPLIED PHYSICS LETTERS, 1995, 67 (21) : 3147 - 3149
  • [8] ERSHOV M, UNPUB
  • [9] FUKS B, 1992, P SOC PHOTO-OPT INS, V1762, P519
  • [10] TRANSIENT-RESPONSE OF INFRARED PHOTOCONDUCTORS - THE ROLES OF CONTACTS AND SPACE-CHARGE
    HAEGEL, NM
    LATASA, CA
    WHITE, AM
    [J]. APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 1993, 56 (01): : 15 - 21