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Proceedings Paper

Recent advances in InAs/GaSb superlattices for very long wavelength infrared detection
Author(s): Gail J. Brown; Frank Szmulowicz; Krishnamur Mahalingam; S. Houston; Yajun Wei; Aaron Gin; Manijeh Razeghi
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Paper Abstract

New infrared (IR) detector materials with high sensitivity, multi-spectral capability, improved uniformity and lower manufacturing costs are required for numerous long and very long wavelength infrared imaging applications. One materials system has shown great theoretical and, more recently, experimental promise for these applications: InAs/InxGa1-xSb type-II superlattices. In the past few years, excellent results have been obtained on photoconductive and photodiode samples designed for infrared detection beyond 15 microns. The infrared properties of various compositions and designs of these type-II superlattices have been studied. The infrared photoresponse spectra are combined with quantum mechanical modeling of predicted absorption spectra to provide insight into the underlying physics behind the quantum sensing in these materials. Results for superlattice photodiodes with cut-off wavelengths as long as 25 microns will be presented.

Paper Details

Date Published: 1 July 2003
PDF: 10 pages
Proc. SPIE 4999, Quantum Sensing: Evolution and Revolution from Past to Future, (1 July 2003); doi: 10.1117/12.483916
Show Author Affiliations
Gail J. Brown, Air Force Research Lab. (United States)
Frank Szmulowicz, Air Force Research Lab. (United States)
Krishnamur Mahalingam, Air Force Research Lab. (United States)
S. Houston, Air Force Research Lab. (United States)
Yajun Wei, Northwestern Univ. (United States)
Aaron Gin, Northwestern Univ. (United States)
Manijeh Razeghi, Northwestern Univ. (United States)

Published in SPIE Proceedings Vol. 4999:
Quantum Sensing: Evolution and Revolution from Past to Future
Manijeh Razeghi; Gail J. Brown, Editor(s)

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