Tuning the optical response of long-wavelength InAs/GaSb Type-II superlattices infrared focal plane arrays with multi-coatings
Author:
Affiliation:

1.Key Laboratory of Infrared Imaging Materials and Devices, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China;2.School of Information Science and Technology, Shanghai Tech University, Shanghai 201210, China

Clc Number:

O43;O47

Fund Project:

Supported by the National Natural Science Foundation of China (NSFC) ( 61904183, and 61974152), the National Key Research and Development Program of China (2016YFB0402403), the Youth Innovation Promotion Association, CAS ( 2016219), the Innovation Engineering Frontier Program of SITP, CAS ( 233) and the Fund of Shanghai Science and Technology Foundation (16JC1400403).

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    Abstract:

    In this paper, the multi-coatings composed of layers of zinc sulfide and germanium were designed and fabricated on a long-wavelength InAs/GaSb Type-II superlattices infrared focal plane arrays (FPAs). Compared with the FPAs without multi-coatings, the multi-coatings make the response peaks of the FPAs shift from the wavelength of 8.7 μm and 10.3 μm to that of 9.8 μm and 11.7 μm. The 50% response cut-off wavelength of the FPAs shifts from 11.6 μm to 12.3 μm, and the response intensity of the FPAs is increased by 69% at the wavelength of 12 μm. In summary, the multi-coatings make the response wavelength of the FPAs tunable, which provides a powerful platform for more sensitive long-wave detection and improving imaging capabilities.

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SHI Rui, ZHOU Jian, BAI Zhi-Zhong, XU Zhi-Cheng, ZHOU Yi, LIANG Zhao-Ming, SHI Ying, XU Qing-Qing, CHEN Jian-Xin. Tuning the optical response of long-wavelength InAs/GaSb Type-II superlattices infrared focal plane arrays with multi-coatings[J]. Journal of Infrared and Millimeter Waves,2022,41(1):280~284

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History
  • Received:June 18,2020
  • Revised:January 11,2022
  • Adopted:August 10,2020
  • Online: January 11,2022
  • Published: