Intermixed quantum well photodetectors for long-wavelength detection

Deepak K. Sengupta; A. P. Curtis; Jay I. Malin; Haochung Kuo; K. C. Hseih; Milton Feng; Gregory E. Stillman; A. Kar; Jyotirmoy Mazumder; Hui Chun Liu; Wen I. Wang

doi:10.1117/12.345368

2 January 1998 Intermixed quantum well photodetectors for long-wavelength detection

Deepak K. Sengupta, A. P. Curtis, Jay I. Malin, Haochung Kuo, K. C. Hseih, Milton Feng, Gregory E. Stillman, A. Kar, Jyotirmoy Mazumder, Hui Chun Liu, Wen I. Wang

Author Affiliations +

Proceedings Volume 3211, International Conference on Fiber Optics and Photonics: Selected Papers from Photonics India '96; (1998) https://doi.org/10.1117/12.345368
Event: International Conference on Fiber Optics and Photonics: Selected Papers from Photonics India '96, 1996, Madras, India

Abstract

Intermixing of the well and barrier layers in quantum well infrared photodetectors (QWIPs) can be used to realize a broadened spectral response as well as multiple color detectors. We describe die experimental results of both rapid thermal annealing (RTA) and laser annealing (LA) QWIPs operating in the 8-12µm regime. The peak spectral response of the annealed detectors was shifted to longer wavelength as compared to die as-grown detectors. In general, a decrease in detector performance after annealing is also observed which may be attributable to a change in the absorption coefficient caused by the out-diffiision of dopants during annealing. Recent advances in growth technology, complimented by innovative structures should offset any degredation in performance. Thus, the post-growth control of the composition profiles by annealing offers opportunities to fine tune various aspects of a QWIP’s response.

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Deepak K. Sengupta, A. P. Curtis, Jay I. Malin, Haochung Kuo, K. C. Hseih, Milton Feng, Gregory E. Stillman, A. Kar, Jyotirmoy Mazumder, Hui Chun Liu, and Wen I. Wang "Intermixed quantum well photodetectors for long-wavelength detection", Proc. SPIE 3211, International Conference on Fiber Optics and Photonics: Selected Papers from Photonics India '96, (2 January 1998); https://doi.org/10.1117/12.345368

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