Demonstration 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 mu m and FWHM of the long-wave infrared (LWIR) band extends from 7.8 - 8.8 mu m. Dual-band QWIP detector arrays were hybridized with direct injection 30 mu m 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 Delta T of 27 and 40 mK for MWIR and LWIR bands respectively.