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The theory and experiment of very-long-wavelength 256×1 GaAs/Al x Ga1−x As quantum well infrared detector linear arrays

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Abstract

The 256×1 linear array of multiple quantum wells infrared photodetector (QWIP) is designed and fabricated for the peak response wavelength at λ P = 14.6 μm. The response spectral width is bigger than 2.2 μm. The two-dimensional (2D) diffractive coupling grating has been formed on the top QWIP photosensitive pixel for coupling the infrared radiation to the infrared detective layers. The performance of the device at V B = 3 V and T = 45 K has the responsibility 4.28×10−2 (A/W), the blackbody detectivity D b* = 5.14×109 (cm·Hz1/2/W), and the peak detectivity D λ * = 4.24× 1010 (cm·Hz1/2/W). The sensor pixels are connected with CMOS read out circuit (ROC) hybridization by indium bumps. When integral time is 100 μs, the linear array has the effective pixel of QWIP FPA N ef of 99.2%, the average responsibility \( \overline R \) (V/W) of 3.48×106 (V/W), the average peak detectivity D λ * of 8.29×109 (cm·Hz1/2/W), and the non-uniformity UR of 5.83%. This device is ready for the thermal image application.

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Authors and Affiliations

  1. National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai, 200083, China

    FangMin Guo, Ning Li, DaYuan Xiong, HongLou Zhen, XiangYan Xu, Ying Hou, RuiJun Ding, Wei Lu, Qi Huang & JunMing Zhou

  2. Institute of Physics, Chinese Academy of Sciences, Beijing, 100080, China

    FangMin Guo, Ning Li, DaYuan Xiong, HongLou Zhen, XiangYan Xu, Ying Hou, RuiJun Ding, Wei Lu, Qi Huang & JunMing Zhou

Authors
  1. FangMin Guo
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  2. Ning Li
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  3. DaYuan Xiong
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  4. HongLou Zhen
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  5. XiangYan Xu
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  6. Ying Hou
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  7. RuiJun Ding
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  8. Wei Lu
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  9. Qi Huang
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  10. JunMing Zhou
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Corresponding authors

Correspondence to FangMin Guo or Wei Lu.

Additional information

Supported by the National Natural Science Foundation of China (Grant No. 10374095)

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Guo, F., Li, N., Xiong, D. et al. The theory and experiment of very-long-wavelength 256×1 GaAs/Al x Ga1−x As quantum well infrared detector linear arrays. Sci. China Ser. G-Phys. Mech. Astron. 51, 805–812 (2008). https://doi.org/10.1007/s11433-008-0090-x

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  • DOI: https://doi.org/10.1007/s11433-008-0090-x

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