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arXiv · 2008.13386

High-speed InAs/GaSb Mid-Wave Infrared Interband Cascade Photodetector at Room Temperature

Zhiyang Xie·Jian Huang·Xuliang Chai·Zhuo Deng·Yaojiang Chen·Qi Lu·Zhicheng Xu·Jianxin Chen·Yi Zhou·Baile Chen
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Abstract

High speed mid-wave infrared (MWIR) photodetectors have important applications in the emerging areas such high-precision frequency comb spectroscopy and light detection and ranging (LIDAR). In this work, we report a high-speed room-temperature mid-wave infrared interband cascade photodetector (ICIP) based on a type-II InAs/GaSb superlattice. The devices show an optical cut-off wavelength around 5um and a 3-dB bandwidth up to 7.04 GHz. The relatively low dark current density around 9.39 x 10-2 A/cm2 under -0.1 V is also demonstrated at 300 K. These results validate the advantages of ICIPs to achieve both high-frequency operation and low noise at room temperature. Limitations on the high-speed performance of the detector are also discussed based on the S-parameter analysis and other RF performance measurement.

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Zhiyang Xie, Jian Huang, Xuliang Chai, Zhuo Deng, Yaojiang Chen, Qi Lu, Zhicheng Xu, Jianxin Chen, Yi Zhou, Baile Chen. 2020-08-31. High-speed InAs/GaSb Mid-Wave Infrared Interband Cascade Photodetector at Room Temperature. https://doi.org/10.1364/oe.409868

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