Long wavelength resonator-QWIPs

K. K. Choi; S. C. Allen; Y. Wei; J. G. Sun; K. A. Olver; R. X. Fu

doi:10.1117/12.2224313

20 May 2016 Long wavelength resonator-QWIPs

K. K. Choi, S. C. Allen, Y. Wei, J. G. Sun, K. A. Olver, R. X. Fu

Author Affiliations +

Proceedings Volume 9819, Infrared Technology and Applications XLII; 981917 (2016) https://doi.org/10.1117/12.2224313
Event: SPIE Defense + Security, 2016, Baltimore, MD, United States

Abstract

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.

Citation Download Citation

K. K. Choi, S. C. Allen, Y. Wei, J. G. Sun, K. A. Olver, and R. X. Fu "Long wavelength resonator-QWIPs", Proc. SPIE 9819, Infrared Technology and Applications XLII, 981917 (20 May 2016); https://doi.org/10.1117/12.2224313

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