Demonstration of Megapixel Dual-Band QWIP Focal Plane Array

Quantum well infrared photodetectors (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 pixe...

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Bibliographic Details
Published in:IEEE journal of quantum electronics 2010-02, Vol.46 (2), p.285-293
Main Authors: Gunapala, S.D., Bandara, S.V., Liu, J.K., Mumolo, J.M., Ting, D.Z., Hill, C.J., Nguyen, J., Simolon, B., Woolaway, J., Wang, S.C., Weiping Li, LeVan, P.D., Tidrow, M.Z.
Format: Article
Language:English
Subjects:
Applied sciences
Arrays
Bolometer
infrared, submillimeter wave, microwave and radiowave receivers and detectors
Cameras
CMOS integrated circuits
Detectors
Devices
Dual band
Electronics
Exact sciences and technology
Focal plane
Indium
Infrared
Infrared detectors
Infrared imaging
Infrared, submillimeter wave, microwave and radiowave instruments, equipment and techniques
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Operating temperature
Optical imaging
Optoelectronic devices
Photodetectors
Physics
Pixel
Pixels
quantum well devices
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Sensor arrays
Sensors
Stability
Stacking
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Summary:Quantum well infrared photodetectors (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 midwave infrared (MWIR) band extends from 4.4-5.1 ¿m and FWHM of the long-wave infrared (LWIR) band extends from 7.8-8.8 ¿m. Dual-band QWIP detector arrays were hybridized with direct injection 30 ¿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 68 K 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.
ISSN:0018-9197
1558-1713
DOI:10.1109/JQE.2009.2024550