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.
Original language | English |
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Patent number | US5506419 |
IPC | H01L 31/ 0352 A I |
Priority date | 10/11/94 |
State | Published - 9 Apr 1996 |