Author/Authors :
Gunapala، نويسنده , , S.D. and Bandara، نويسنده , , S.V. and Liu، نويسنده , , J.K. and Mumolo، نويسنده , , J.M. and Ting، نويسنده , , D.Z. and Hill، نويسنده , , C.J. and Nguyen، نويسنده , , J. and Simolon، نويسنده , , B. and Woolaway، نويسنده , , J. and Wang، نويسنده , , SC and Li، نويسنده , , W. and LeVan، نويسنده , , P.D. and Tidrow، نويسنده , , M.Z.، نويسنده ,
Abstract :
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 μm and the FWHM of a long-wave infrared (LWIR) band extends from 7.8 to 8.8 μm. 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 NEΔT of 27 and 40 mK for MWIR and LWIR bands, respectively.
Keywords :
Quantum wells , focal plane arrays , QWIP , Dualband , Infrared Detectors , Infrared imaging
