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Proceedings Paper

Antimony-based superlattices for high-performance infrared imagers
Author(s): Martin Walther; Robert Rehm; Johannes Schmitz; Frank Rutz; Joachim Fleissner; Johann Ziegler
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Paper Abstract

InAs/GaSb short-period superlattices (SL) for the fabrication of mono- and bispectral thermal imaging systems in the mid-wavelength infrared region (MWIR) have been optimized in order to increase the spectral response of the imaging systems. The responsivity in monospectral InAs/GaSb short-period superlattices increases with the number of periods in the intrinsic region of the diode and does not show a diffusion limited behavior for detector structures with up to 1000 periods. This allows the fabrication of InAs/GaSb SL camera systems with high responsivity. Dual-color MWIR/MWIR InAs/GaSb SL camera systems with high quantum efficiency for missile approach warning systems with simultaneous and spatially coincident detection in both spectral channels have been realized.

Paper Details

Date Published: 15 April 2008
PDF: 8 pages
Proc. SPIE 6940, Infrared Technology and Applications XXXIV, 69400A (15 April 2008); doi: 10.1117/12.777515
Show Author Affiliations
Martin Walther, Fraunhofer-Institut für Angewandte Festkörperphysik (Germany)
Robert Rehm, Fraunhofer-Institut für Angewandte Festkörperphysik (Germany)
Johannes Schmitz, Fraunhofer-Institut für Angewandte Festkörperphysik (Germany)
Frank Rutz, Fraunhofer-Institut für Angewandte Festkörperphysik (Germany)
Joachim Fleissner, Fraunhofer-Institut für Angewandte Festkörperphysik (Germany)
Johann Ziegler, AIM Infrarot-Module GmbH (Germany)

Published in SPIE Proceedings Vol. 6940:
Infrared Technology and Applications XXXIV
Bjørn F. Andresen; Gabor F. Fulop; Paul R. Norton, Editor(s)

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