Journal
INFRARED PHYSICS & TECHNOLOGY
Volume 52, Issue 6, Pages 395-398Publisher
ELSEVIER
DOI: 10.1016/j.infrared.2009.05.019
Keywords
Infrared detectors; Quantum wells; QWIP; Dualband; Infrared imaging; Focal plane arrays
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This paper reports the first demonstration of the megapixel-simultaneously-readable and pixel-co-registered dual-band quantum well infrared photodetector (QWIP) focal plane array (FPA). The dual-band QWIP device was developed by stacking two multi-quantum-well stacks tuned to absorb two different infrared wavelengths. The full width at half maximum (FWHM) of the mid-wave infrared (MWIR) band extends from 4.4 to 5.1 mu m and the FWHM of a long-wave infrared (LWIR) band extends from 7.8 to 8.8 mu m. Dual-band QWIP detector arrays were hybridized with custom fabricated direct injection read out integrated circuits (ROICs) using the indium bump hybridization technique. The initial dual-band megapixel QWIP FPAs were cooled to 70 K operating temperature. The preliminary data taken from the first megapixel QWIP FPA has shown system NE Delta T of 27 and 40 mK for MWIR and LWIR bands, respectively. (C) 2009 Elsevier B.V. All rights reserved.
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