Two-color quantum well infrared photodetector focal plane arrays

• Published in: Infrared physics & technology 2001-06, Vol.42 (3), p.301-308
• Main Authors: Sundaram, Mani, Wang, Samuel C, Taylor, Michael F, Reisinger, Axel, Milne, Greg L, Reiff, Kirk B, Rose, Roger E, Martin, Robert R
• Format: Article
• Language: English
• Subjects: Applied sciences; Bolometer; infrared, submillimeter wave, microwave and radiowave receivers and detectors; Bolometers; infrared, submillimeter wave, microwave, and radiowave receivers and detectors; 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; Photodetectors (including infrared and CCD detectors); Physics; Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
• ISSN: 1350-4495; 1879-0275
• DOI: 10.1016/S1350-4495(01)00088-3

We summarize the current state of two-color quantum well infrared photodetector (QWIP) focal plane array (FPA) technology. Our two-color FPA architecture features 3 bumps/pixel to permit two vertically-stacked QWIPs to be separately biased and the two photocurrents to be simultaneously integrated. Pixel-registered imagery is simultaneously obtained in two spectral bands. We have successfully applied this architecture to realize two-color FPAs in three separate formats: LW/LW, MW/LW, and MW/MW. Fabrication and performance details are presented.