Optimization of corrugated QWIPs for high-speed infrared imaging

Kwong-Kit Choi; Kok Ming Leung; Theodor Tamir; Carlos Monroy; F. Wang; Daniel C. Tsui

doi:10.1117/12.540992

30 August 2004 Optimization of corrugated QWIPs for high-speed infrared imaging

Kwong-Kit Choi, Kok Ming Leung, Theodor Tamir, Carlos Monroy, F. Wang, Daniel C. Tsui

Proceedings Volume 5406, Infrared Technology and Applications XXX; (2004) https://doi.org/10.1117/12.540992
Event: Defense and Security, 2004, Orlando, Florida, United States

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.

Citation Download Citation

Kwong-Kit Choi, Kok Ming Leung, Theodor Tamir, Carlos Monroy, F. Wang, and Daniel C. Tsui "Optimization of corrugated QWIPs for high-speed infrared imaging", Proc. SPIE 5406, Infrared Technology and Applications XXX, (30 August 2004); https://doi.org/10.1117/12.540992

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