Peak detection wavelength at 8 μm: accurate design and fabrication of quantum well infrared photodetector

Home > Archive>Volume 31, Issue 6, 2012 >481-485

Peak detection wavelength at 8 μm: accurate design and fabrication of quantum well infrared photodetector
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                        JIN Ju-PengJIN Ju-Peng
Key Laboratory of Infrared Imaging Materials and Detectors,Shanghai Institute of Technical Physics, Chinese Academy of Sciences
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LIU DanLIU Dan
Key Laboratory of Infrared Imaging Materials and Detectors, Shanghai Institute of Technical Physics, Chinese Academy of Sciences
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CHEN Jian-XinCHEN Jian-Xin
Key Laboratory of Infrared Imaging Materials and Detectors, Shanghai Institute of Technical Physics, Chinese Academy of Sciences
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LIN ChunLIN Chun
Key Laboratory of Infrared Imaging Materials and Detectors, Shanghai Institute of Technical Physics, Chinese Academy of Sciences
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Affiliation:Key Laboratory of Infrared Imaging Materials and Detectors, Shanghai Institute of Technical Physics, Chinese Academy of Sciences,Key Laboratory of Infrared Imaging Materials and Detectors, Shanghai Institute of Technical Physics, Chinese Academy of Sciences,Key Laboratory of Infrared Imaging Materials and Detectors, Shanghai Institute of Technical Physics, Chinese Academy of Sciences,Key Laboratory of Infrared Imaging Materials and Detectors,Shanghai Institute of Technical Physics, Chinese Academy of Sciences
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Abstract:

Using one band effective mass approximation and shooting method, optimized parameters of quantum well infrared photodetector structure were calculated. Taking into account high order effect of band nonparabolicity, the device structure with a peak detection wavelength of 8 μm were designed. Based on the calculated result, GaAs/AlGaAs multiwell material was grown. Then single-element QWIP device were fabricated and characterized. Symmetrical I-V curves showed very good quality of the material and successful process in device fabrication. Spectral responsivity exhibited peak wavelength of 7.96 and 7.98 μm, which were in excellent agreement with our designed value.

Key words:QWIP; GaAs/AlGaAs; peak detection wavelength; spectral responsivity; band nonparabolicity

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JIN Ju-Peng, LIU Dan, CHEN Jian-Xin, LIN Chun. Peak detection wavelength at 8 μm: accurate design and fabrication of quantum well infrared photodetector[J]. Journal of Infrared and Millimeter Waves,2012,31(6):481~485

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Received:June 17,2011
Revised:March 01,2012
Adopted:July 19,2012
Online: November 21,2012
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