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Proceedings Paper

A GaAs-based up-converter for mid-infrared detection utilizing quantum cascade transport
Author(s): Zhibiao Hao; Lili Xie; Chao Wang; Yaqi Liu; Lai Wang; Jian Wang; Bing Xiong; Changzheng Sun; Yanjun Han; Hongtao Li; Yi Luo
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Paper Abstract

The next generation infrared (IR) detection technology demands for very-large-format focal plane arrays (FPAs) with high performance. Semiconductor up-converters can convert IR photons to near-infrared (NIR) photons, and can be potential candidates for large-format IR imaging since the mechanical bonding with the read-out circuits can be avoided. However, previously reported up-converters and corresponding up-conversion systems suffer from low detectivity because of the trade-off between responsivity and dark current. To solve this issue, a cascade infrared up-converter (CIUP) is demonstrated in this work. Based on a quantum cascade transport mechanism, high IR responsivity is achieved while the dark current is maintained fairly low. A 4-μm InGaAs/AlGaAs CIUP has been fabricated, and both the CIUP and up-conversion system are under background-limited infrared performance (BLIP) regime below 120 K. The upconversion efficiency is 2.1 mW/W at 3.3 V and 78 K. Taking shot noise as the main noise in the up-conversion system, the BLIP detectivity of the system is 2.4×109 Jones at 3.3 V and 78 K, higher than the semiconductor up-converters at similar wavelengths reported so far. To further improve the CIUP performance, an AlInP hole-blocking layer is introduced taking place of the AlAs layer. AlInP/GaAs has larger valence band discontinuity than AlAs/GaAs, showing the advantage of tightly confining injected holes into the emission quantum well. By adopting the AlInP hole-blocking layer, the quantum efficiency and detectivity of the up-conversion system can be enhanced.

Paper Details

Date Published: 30 August 2017
PDF: 8 pages
Proc. SPIE 10403, Infrared Remote Sensing and Instrumentation XXV, 1040309 (30 August 2017); doi: 10.1117/12.2273105
Show Author Affiliations
Zhibiao Hao, Tsinghua Univ. (China)
Lili Xie, Tsinghua Univ. (China)
Chao Wang, Tsinghua Univ. (China)
Yaqi Liu, Tsinghua Univ. (China)
Lai Wang, Tsinghua Univ. (China)
Jian Wang, Tsinghua Univ. (China)
Bing Xiong, Tsinghua Univ. (China)
Changzheng Sun, Tsinghua Univ. (China)
Yanjun Han, Tsinghua Univ. (China)
Hongtao Li, Tsinghua Univ. (China)
Yi Luo, Tsinghua Univ. (China)

Published in SPIE Proceedings Vol. 10403:
Infrared Remote Sensing and Instrumentation XXV
Marija Strojnik; Maureen S. Kirk, Editor(s)

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