Journal
OPTICS EXPRESS
Volume 28, Issue 24, Pages 36915-36923Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.409868
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Funding
- National Key Research and Development Program of China [2019YFB2203400]
- Shanghai-Tech University [F-0203-16-002]
- National Natural Science Foundation of China [61534006, 61974152, 61975121]
- Strategic Priority Research Program of Chinese Academy of Sciences [XDA18010000]
- Youth Innovation Promotion Association of the Chinese Academy of Sciences [2016219]
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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 mu m and a 3-dB bandwidth up to 7.04 GHz. The relatively low dark current density around 9.39 x 10(-2) A/cm(2) 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. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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