Quantum well photodetector with pseudo-random reflection

Details Quantum well photodetector with pseudo-random reflection Quantum well photodetector with pseudo-random reflection

1994-11-10

1996-04-09

Mintel, William

Active solid-state devices (e.g., transistors, solid-state diode

Thin active physical layer which is

Heterojunction

257 21, 257 22, 257432, 257436, H01L 2906, H01L 310328, H01L 310336

Patent

active

055064191

ABSTRACT:
Quantum well infrared photodetectors (QWIPs) according to the invention have a surface that provides pseudo-random reflection of the radiation that is incident thereon, resulting in an increase in the effective number of passes of the radiation through the quantum well region, and hence in increased responsivity of the QWIPs, as compared to corresponding prior art grating QWIPs. A convenient approach to forming the pseudo-random reflecting surface is disclosed.

REFERENCES:
patent: 5272356 (1993-12-01), Wen et al.
patent: 5282902 (1994-02-01), Matsuyama

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