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Proceedings Paper

Radiation tolerance of type-II strained layer superlattice-based interband cascade infrared photodetectors (ICIP)
Author(s): Vincent M. Cowan; Laura A. Treider; Christian P. Morath; Zhaobing Tian; Nutan Gautam; Sanjay Krishna
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Paper Abstract

For space-based imaging systems radiation tolerance to both displacement damage and total ionizing dose (TID) radiation effects continues to be a major performance concern. Here, the TID and proton irradiance tolerance of mid wave infrared interband cascade infrared photodetectors (ICIPs) based on InAs/GaSb type II strained-layer superlattice (T2SLS) absorbers is presented. Protons of energy of 63 MeV were used to irradiate the unbiased ICIP detectors at room temperature to a proton fluence of 7.5 x 1011 protons/cm2, corresponding to a TID of 100 kRads(Si). A comparison of the detector performance of a variety of ICIPs with different numbers of electron barrier sizes cascade stages is presented. Performance of detectors of varying size was characterized by dark current and quantum efficiency measurements at different temperatures. Results show changes, increase in dark current and a reduction in the quantum efficiency, consistent with an increase in the trap density.

Paper Details

Date Published: 24 September 2013
PDF: 8 pages
Proc. SPIE 8876, Nanophotonics and Macrophotonics for Space Environments VII, 88760A (24 September 2013); doi: 10.1117/12.2022529
Show Author Affiliations
Vincent M. Cowan, Air Force Research Lab. (United States)
Laura A. Treider, Air Force Research Lab. (United States)
Christian P. Morath, Air Force Research Lab. (United States)
Zhaobing Tian, The Univ. of New Mexico (United States)
Nutan Gautam, The Univ. of New Mexico (United States)
Sanjay Krishna, The Univ. of New Mexico (United States)

Published in SPIE Proceedings Vol. 8876:
Nanophotonics and Macrophotonics for Space Environments VII
Edward W. Taylor; David A. Cardimona, Editor(s)

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