Journal
OPTICAL ENGINEERING
Volume 53, Issue 4, Pages -Publisher
SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
DOI: 10.1117/1.OE.53.4.043107
Keywords
high-operation temperature detectors; HgCdTe multiple photodetectors; type-II InAs/GaSb superlattice photodetectors; interband cascade infrared detectors
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Funding
- Polish National Science Centre [UMO-2012/07/D/ST7/02564, PBS 849]
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Recently, a new strategy to achieve high-operating temperature (HOT) infrared photodetectors to include cascade devices and alternate materials such as type-II superlattices has been observed. Another method to reduce dark current is related to the limitation of the volume of detector material via a concept of a photon-trapping detector. The performance of an innovative HOT detector designing so-called interband (IB) cascade type-II MWIR InAs/GaSb superlattice detectors is presented. Detailed analysis of the detector's performance (such as dark current, RA product, current responsivity, and response time) versus bias voltage and operating temperatures (220 to 400 K) is performed, pointing out the optimal working conditions. At the present stage of technology, the experimentally measured R(0)A values of the IB cascade type-II superlattice detectors at room temperature are higher than those predicted for HgCdTe photodiodes. It is shown that these HOT detectors have emerged as the competitors of HgCdTe photodetectors. (C) 2014 Society of Photo-Optical Instrumentation Engineers (SPIE)
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