Volume 49 Issue 1
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Article Navigation >  Infrared and Laser Engineering  > 2020  >  49(1): 0103008-0103008(6)

Li Xiangyang, Li Ning, Xu Jintong, Chu Kaihui, Xu Guoqing, Wang Ling, Zhang Yan, Zhu Longyuan, Wang Jiqiang, Lu Wei. GaAs/AlGaAs QWIP IRFPA for 10.55 μm long wavelength[J]. Infrared and Laser Engineering, 2020, 49(1): 0103008-0103008(6). doi: 10.3788/IRLA202049.0103008
Citation: Li Xiangyang, Li Ning, Xu Jintong, Chu Kaihui, Xu Guoqing, Wang Ling, Zhang Yan, Zhu Longyuan, Wang Jiqiang, Lu Wei. GaAs/AlGaAs QWIP IRFPA for 10.55 μm long wavelength[J]. Infrared and Laser Engineering, 2020, 49(1): 0103008-0103008(6). doi: 10.3788/IRLA202049.0103008
shu

GaAs/AlGaAs QWIP IRFPA for 10.55 μm long wavelength

doi: 10.3788/IRLA202049.0103008

  • Institute of Shanghai Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China

  • Received Date: 2019-10-05
  • Rev Recd Date: 2019-11-15
  • Publish Date: 2020-01-28
  • 640×512 Quantum Well Infrared Photo-detector(QWIP) long wavelength infrared(LWIR) focal plane arrays(FPA) were made by using GaAs/AlGaAs quantum well structure. The response spectra were at 10.55 μm. Integrated with rotation sterling cooler which gave a temperature of 50 K, the FPA was measured to find the results that NETD was about 22.5 mK. The FPA assembly kept good performance after the switch-on-off cycling test and thermal vacuum test. The illumination non-uniformity of the focal plane with a cold shield was calculated with a numerical method. The results were compared with the approximate analytic method. It is shown that numerical method should be used for small F-numbers. Thus, the measured non-uniformity is believed to be dominated by the illumination non-uniformity. By using the MEEP FDTD software, calculation about the near-field photo-coupled electrical-field energy were designed and results show that current QWIP structure parameters are near optimized in term of optical diffraction.
  • [1] Levine B F, Choi K K, Bethea C G, et al. New 10μm infrared detector using intersubband absorption in resonant tunneling GaAlAs superlattices[J]. Appl Phys Lett, 1987, 50:1092.
    [2] Jhabvala M, Choi K, Waczynski A, et al. Performance ofthe QWIP focal plane arrays for NASA's Landsat Data Continuity Mission[C]//SPIE, Infrared Technology and Applications XXXVII, 2011, 8012:80120Q.
    [3] Zhou Xiaohao, Li Ning, Lu Wei. Progress in quantum well and quantum cascade infrared photodetectors in SITP[J]. Chinese Phys B, 2019, 28(2):027801. (in Chinese)
    [4] Oskooi A, Roundy D, Ibanescu M, et al. MEEP:A flexible free-software package for electromagnetic simulations by the FDTD method[J]. Computer Physics Communications, 2010, 181:687-702.
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GaAs/AlGaAs QWIP IRFPA for 10.55 μm long wavelength

doi: 10.3788/IRLA202049.0103008
  • Institute of Shanghai Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China
  • Received Date: 2019-10-05
  • Rev Recd Date: 2019-11-15
  • Publish Date: 2020-01-28

Abstract: 640×512 Quantum Well Infrared Photo-detector(QWIP) long wavelength infrared(LWIR) focal plane arrays(FPA) were made by using GaAs/AlGaAs quantum well structure. The response spectra were at 10.55 μm. Integrated with rotation sterling cooler which gave a temperature of 50 K, the FPA was measured to find the results that NETD was about 22.5 mK. The FPA assembly kept good performance after the switch-on-off cycling test and thermal vacuum test. The illumination non-uniformity of the focal plane with a cold shield was calculated with a numerical method. The results were compared with the approximate analytic method. It is shown that numerical method should be used for small F-numbers. Thus, the measured non-uniformity is believed to be dominated by the illumination non-uniformity. By using the MEEP FDTD software, calculation about the near-field photo-coupled electrical-field energy were designed and results show that current QWIP structure parameters are near optimized in term of optical diffraction.

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