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Proceedings Paper

Intermixed quantum well photodetectors for long-wavelength detection
Author(s): 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
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Paper 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.

Paper Details

Date Published: 2 January 1998
PDF: 5 pages
Proc. SPIE 3211, International Conference on Fiber Optics and Photonics: Selected Papers from Photonics India '96, (2 January 1998); doi: 10.1117/12.345368
Show Author Affiliations
Deepak K. Sengupta, Univ. of Illinois/Urbana-Champaign (United States)
A. P. Curtis, Univ. of Illinois/Urbana-Champaign (United States)
Jay I. Malin, Univ. of Illinois/Urbana-Champaign (United States)
Haochung Kuo, Univ. of Illinois/Urbana-Champaign (United States)
K. C. Hseih, Univ. of Illinois/Urbana-Champaign (United States)
Milton Feng, Univ. of Illinois/Urbana-Champaign (United States)
Gregory E. Stillman, Univ. of Illinois/Urbana-Champaign (United States)
A. Kar, Univ. of Illinois/Urbana-Champaign (United States)
Jyotirmoy Mazumder, Univ. of Illinois/Urbana-Champaign (United States)
Hui Chun Liu, National Research Council Canada (Canada)
Wen I. Wang, Columbia Univ. (United States)


Published in SPIE Proceedings Vol. 3211:
International Conference on Fiber Optics and Photonics: Selected Papers from Photonics India '96
J. P. Raina; P. R. Vaya, Editor(s)

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