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3 May 2010Demonstration of 1024x1024 pixel dual-band QWIP focal plane array
QWIPs are well known for their stability, high pixel-pixel uniformity and high pixel operability which are
quintessential parameters for large area imaging arrays. In this paper we report the first demonstration of
the megapixel-simultaneously-readable and pixel-co-registered dual-band 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 - 5.1 μm and FWHM of the long-wave infrared (LWIR) band extends from 7.8 - 8.8
μm. Dual-band QWIP detector arrays were hybridized with direct injection 30 μm pixel pitch megapixel
dual-band simultaneously readable CMOS read out integrated circuits using the indium bump hybridization
technique. The initial dual-band megapixel QWIP FPAs were cooled to 68K operating temperature. The
preliminary data taken from the first megapixel QWIP FPA has shown system NE▵T of 27 and 40 mK for
MWIR and LWIR bands respectively.
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S. D. Gunapala, S. V. Bandara, J. K. Liu, J. M. Mumolo, D. Z. Ting, C. J. Hill, J. Nguyen, S. B. Rafol, "Demonstration of 1024x1024 pixel dual-band QWIP focal plane array," Proc. SPIE 7660, Infrared Technology and Applications XXXVI, 76603L (3 May 2010); https://doi.org/10.1117/12.851175