20 May 2016 Long wavelength resonator-QWIPs
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We are developing resonator-QWIPs for long wavelength applications. Detector pixels with 25 μm pitch were hybridized to fanout circuits for radiometric measurements. With a moderate doping of 0.5 x 1018 cm-3, we achieved a quantum efficiency of 37% and conversion efficiency of 15% in a 1.3 μm-thick active material and 35% QE and 21% CE in a 0.6 μm-thick active material. Both detectors are cutoff at 10.5 μm with a 2 μm bandwidth. The temperature at which photocurrent equals dark current is about 65 K under F/2 optics. The thicker detector shows a large QE polarity asymmetry due to nonlinear potential drop in the QWIP material layers.
© (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
K. K. Choi, K. K. Choi, S. C. Allen, S. C. Allen, Y. Wei, Y. Wei, J. G. Sun, J. G. Sun, K. A. Olver, K. A. Olver, R. X. Fu, R. X. Fu, "Long wavelength resonator-QWIPs", Proc. SPIE 9819, Infrared Technology and Applications XLII, 981917 (20 May 2016); doi: 10.1117/12.2224313; https://doi.org/10.1117/12.2224313


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