Optimization of corrugated QWIPs for high speed infrared imaging

K. K. Choi, K. M. Leung, T. Tamir, C. Monroy, F. Wang, D. C. Tsui

    Research output: Contribution to journalConference articlepeer-review


    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.

    Original languageEnglish (US)
    Pages (from-to)605-616
    Number of pages12
    JournalProceedings of SPIE - The International Society for Optical Engineering
    Issue numberPART 2
    StatePublished - 2004
    EventInfrared Technology and Applications XXX - Orlando, FL, United States
    Duration: Apr 14 2004Dec 15 2004


    • Electromagnetic modeling
    • High speed imaging
    • QWIPs

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics
    • Computer Science Applications
    • Applied Mathematics
    • Electrical and Electronic Engineering


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