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Proceedings Paper

Optimization of corrugated QWIPs for high-speed infrared imaging
Author(s): Kwong-Kit Choi; Kok Ming Leung; Theodor Tamir; Carlos Monroy; F. Wang; Daniel C. Tsui
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Paper Abstract

Corrugated quantum well infrared photodetectors (C-QWIPs) offer simple detector architecture for large format infrared focal plane arrays. The detector relies on inclined sidewalls to couple normal incident light into the absorbing material. In this work, we describe the light coupling characteristics of C-QWIPs based on a simple geometrical-optics model and a rigorous modal transmission-line model. Based on these two theoretical models, we optimize the detector structure toward a large quantum efficiency η. In addition, we investigated material structures that give both high photoconductive gain and large spectral bandwidth. Combining these two material properties with a large η offered by the corrugated structure, the detector photocurrent can be greatly increased, which will be useful in high speed infrared imaging.

Paper Details

Date Published: 30 August 2004
PDF: 12 pages
Proc. SPIE 5406, Infrared Technology and Applications XXX, (30 August 2004); doi: 10.1117/12.540992
Show Author Affiliations
Kwong-Kit Choi, Army Research Lab. (United States)
Kok Ming Leung, Polytechnic Univ. (United States)
Theodor Tamir, Polytechnic Univ. (United States)
Carlos Monroy, Army Research Lab. (United States)
F. Wang, Princeton Univ. (United States)
Daniel C. Tsui, Princeton Univ. (United States)

Published in SPIE Proceedings Vol. 5406:
Infrared Technology and Applications XXX
Bjorn F. Andresen; Gabor F. Fulop, Editor(s)

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