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Antimony-based superlattices for high-performance infrared imagers

Antimonidische Übergitter für hochleistungsfähige Infrarotdetektoren
: Walther, M.; Rehm, R.; Schmitz, J.; Rutz, F.; Fleißner, J.; Ziegler, J.


Andresen, B.F. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Infrared technology and applications XXXIV. Vol.1 : 17 - 20 March 2008, Orlando, Florida, USA; Thirty-Fourth Conference on Infrared Technology and Applications
Bellingham, WA: SPIE, 2008 (SPIE Proceedings Series 6940)
ISBN: 978-0-8194-7131-4
ISBN: 0-8194-7131-3
ISSN: 0277-786X
Paper 69400A
Conference on Infrared Technology and Applications <34, 2008, Orlando/Fla.>
Conference Paper
Fraunhofer IAF ()
infrared camera; Infrarotkamera; bispectral; bispektral; InAs/(GaIn)Sb Übergitter; InAs/(GaIn)Sb superlattice; Raketenwarnsensorik; missile warning sensor; thermal imaging; Thermographie; focal plane array; Bildfeldmosaik; dual-color; Zweifarben

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.