High-speed mid-wave infrared interband cascade photodetector at room temperature

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 based...

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Bibliographic Details
Published in:Optics express 2020-11, Vol.28 (24), p.36915-36923
Main Authors: Xie, Zhiyang, Huang, Jian, Chai, Xuliang, Deng, Zhuo, Chen, Yaojiang, Lu, Qi, Xu, Zhicheng, Chen, Jianxin, Zhou, Yi, Chen, Baile
Format: Article
Language:English
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Summary: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 based on a type-II InAs/GaSb superlattice. The devices show an optical cut-off wavelength around 5 µm and a 3-dB bandwidth up to 7.04 GHz. The relatively low dark current density around 9.39 × 10 A/cm 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.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.409868