VOLTAGE TUNABLE 3-COLOR QUANTUM-WELL INFRARED PHOTODETECTOR

被引：25
|
作者：
TIDROW, MZ [1 ]
CHOI, KK [1 ]
LEE, CY [1 ]
CHANG, WH [1 ]
TOWNER, FJ [1 ]
AHEARN, JS [1 ]
机构：
[1] MARTIN MARIETTA CORP LABS,BALTIMORE,MD 21227
来源：
APPLIED PHYSICS LETTERS | 1994年 / 64卷 / 10期
关键词：
D O I：
10.1063/1.110861
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
A voltage tunable three-color quantum well infrared photodetector (QWIP) consisting of asymmetric GaAs/AlGaAs double quantum wells has been demonstrated. The detector uses electron intersubband transitions in a coupled asymmetric double quantum well superlattice. The infrared photocurrent spectrum characterized using a blackbody monochromator source shows three prominent peaks appearing at 8.4 mum, 9.6 mum, and 10.3 mum under different biases. The three detection peaks are well resolved and can be independently selected by tuning the applied voltage. The responsivity and the detectivity of the detector at different biases and operating temperatures are characterized and found to be sufficient for detector operation at temperatures approximately 60 K.
引用
收藏
页码：1268 / 1270
页数：3
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