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Proceedings Paper

Single- and two-color HgTe/CdTe superlattice based infrared detectors
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Paper Abstract

The optimal performance of HgTe/CdTe superlattice-based LWIR (8-12 μm cutoff wavelengths) and VLWIR (greater than 12um cutoff wavelength) photovoltaic detectors is assessed theoretically. The electronic band structures and optical absorption spectra are computed with a fourteen-band restricted-basis envelope function Hamiltonian. Auger and radiative lifetimes are computed with these accurate band structures. Vertical carrier mobilities are obtained from a Monte Carlo transport methodology. Photon detectors are modeled by solving current continuity and Poisson's equations. Predictions are compared with those for HgCdTe-alloy based detectors. We find that the superlattice-based two-color detector promise sharp rises in quantum efficiencies near the cutoff wavelengths, reflecting the quasi-2-dimensional nature of their density of states.

Paper Details

Date Published: 28 February 2006
PDF: 11 pages
Proc. SPIE 6127, Quantum Sensing and Nanophotonic Devices III, 61270W (28 February 2006); doi: 10.1117/12.640090
Show Author Affiliations
C. H. Grein, EPIR Technologies, Inc. (United States)
P. Boieriu, EPIR Technologies, Inc. (United States)
M. E. Flatté, Univ. of Iowa (United States)


Published in SPIE Proceedings Vol. 6127:
Quantum Sensing and Nanophotonic Devices III
Manijeh Razeghi; Gail J. Brown, Editor(s)

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