Development of bi-spectral InAs/GaSb type II superlattice image detectors

T. Stadelmann; A. Wörl; M. Wauro; V. Daumer; J. Niemasz; W. Luppold; T. Simon; M. Riedel; R. Rehm; M. Walther

doi:10.1117/12.2049951

24 June 2014 Development of bi-spectral InAs/GaSb type II superlattice image detectors

T. Stadelmann, A. Wörl, M. Wauro, V. Daumer, J. Niemasz, W. Luppold, T. Simon, M. Riedel, R. Rehm, M. Walther

Proceedings Volume 9070, Infrared Technology and Applications XL; 90700V (2014) https://doi.org/10.1117/12.2049951
Event: SPIE Defense + Security, 2014, Baltimore, MD, United States

Abstract

InAs/GaSb superlattices are characterized by a broken-gap type II band alignment. Their effective band gap can be engineered to match mid to long wavelength infrared (IR) photon energies. Fraunhofer IAF has developed image detectors for threat warning systems based on this material system that are capable of spatially and temporally coincident detection in two mid-IR wavelength ranges. We review the present status of the processing technology, report continuous improvements achieved in key areas of detector performance, including defect density and noise behavior, and present initial results for statistical characterization of ensembles of detector elements with respect to diode characteristics and noise.

Citation Download Citation

T. Stadelmann, A. Wörl, M. Wauro, V. Daumer, J. Niemasz, W. Luppold, T. Simon, M. Riedel, R. Rehm, and M. Walther "Development of bi-spectral InAs/GaSb type II superlattice image detectors", Proc. SPIE 9070, Infrared Technology and Applications XL, 90700V (24 June 2014); https://doi.org/10.1117/12.2049951

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