Intermixed quantum well photodetectors for long wavelength detection

D. K. Sengupta, A. P. Curtis, J. I. Malin, Hao-Chung Kuo, K. C. Hseih, M. Feng, G. E. Stillman, A. Kar, J. Mazumder, H. C. Liu, W. I. Wang

研究成果: Conference article同行評審


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 the experimental results of bom 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 the 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-diffusion of dopants during annealing. Recent advances in growth technology, complimented by innovative structures should offset any degradation 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.

頁(從 - 到)138-142
期刊Proceedings of SPIE - The International Society for Optical Engineering
出版狀態Published - 1 12月 1998
事件International Conference on Fiber Optics and Photonics: Selected Papers from Photonics India '96 - Madras, India
持續時間: 9 12月 19969 12月 1996


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