26 September 2016 Proton radiation experimental results on a III-V nBn mid-wavelength infrared focal plane array
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This paper will report on the proton, and total ionizing dose characterizations of an MWIR nBn detector array. The FPA was fabricated using MWIR nBn infrared detectors, which have a cutoff wavelength of approximately 5.0 μm at 120 K. Full radiometric characterizations were performed at multiple total ionizing dose levels to determine the impact of the radiation on the FPA noise, responsivity, NEI, and dynamic range. Displacement damage effects on the MWIR nBn detectors was evaluated at a proton energy of 63 MeV. These displacement damage effects primarily degrade the performance of the detector array through increased dark current, generation of "hot pixels" due to elevated dark current that form a tail to the dark current distribution, reduction in responsivity, and degraded uniformity. The majority of the performance degradation of the MWIR nBn detectors due to proton interactions can be attributed to a reduction in the minority carrier lifetime in the absorber region of the nBn detector.
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John E. Hubbs, John E. Hubbs, "Proton radiation experimental results on a III-V nBn mid-wavelength infrared focal plane array", Proc. SPIE 9933, Optical Sensing, Imaging, and Photon Counting: Nanostructured Devices and Applications 2016, 993307 (26 September 2016); doi: 10.1117/12.2240199; https://doi.org/10.1117/12.2240199


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