1024 x 1024 Format pixel co-located simultaneously readable dual-band QWIP focal plane

• Published in: Infrared physics & technology 2009-11, Vol.52 (6), p.395-398
• Main Authors: GUNAPALA, S. D, BANDARA, S. V, LI, W, LEVAN, P. D, TIDROW, M. Z, LIU, J. K, MUMOLO, J. M, TING, D. Z, HILL, C. J, NGUYEN, J, SIMOLON, B, WOOLAWAY, J, WANG, S. C
• Format: Article
• Language: English
• Subjects: Applied sciences; Bolometer; infrared, submillimeter wave, microwave and radiowave receivers and detectors; Communication, education, history, and philosophy; Electronics; Exact sciences and technology; Infrared, submillimeter wave, microwave and radiowave instruments, equipment and techniques; Instruments, apparatus, components and techniques common to several branches of physics and astronomy; Optoelectronic devices; Physics; Physics literature and publications; Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
• ISSN: 1350-4495; 1879-0275
• DOI: 10.1016/j.infrared.2009.05.019

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 km and the FWHM of a long-wave infrared (LWIR) band extends from 7.8 to 8.8 km. 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 NET of 27 and 40 mK for MWIR and LWIR bands, respectively.