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20 January 2012Optically addressed multiband photodetector for infrared imaging
applications
Multiband infrared focal plane arrays (FPAs) with small pixel pitch have increased device processing complexity since
they often need more than two terminals per pixel for readouts. Simpler FPAs are enabled by our newly demonstrated
optically-addressed two-terminal multiband photodetector architecture. For long-wavelength infrared (LWIR) and midwavelength
infrared (MWIR) imaging applications, the use of quantum well infrared photodetectors (QWIP) has been
investigated. The results show that the utilization of unipolar QWIPs with bipolar near infrared (NIR) devices is feasible
with this new optical-addressing scheme. Potential device performance is analyzed with an equivalent AC circuit model.
Proposed design maximizes fill factor and enables small pixel-pitch FPA with single indium-bump per pixel for
NIR/MWIR/LWIR multiband detection capability.
O. O. Cellek andY.-H. Zhang
"Optically addressed multiband photodetector for infrared imaging
applications", Proc. SPIE 8268, Quantum Sensing and Nanophotonic Devices IX, 82682N (20 January 2012); https://doi.org/10.1117/12.909063
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O. O. Cellek, Y.-H. Zhang, "Optically addressed multiband photodetector for infrared imaging applications," Proc. SPIE 8268, Quantum Sensing and Nanophotonic Devices IX, 82682N (20 January 2012); https://doi.org/10.1117/12.909063