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

XIE, Z. and HUANG, J. and CHAI, X. and DENG, Z. and CHEN, Y. and LU, Q. and XU, Z. and CHEN, J. and ZHOU, Y. and CHEN, B. (2020) High-speed mid-wave infrared interband cascade photodetector at room temperature. Optics Express, 28 (24). pp. 36915-36923. ISSN 1094-4087

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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 μm and a 3-dB bandwidth up to 7.04 GHz. The relatively low dark current density around 9.39 × 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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Journal Article
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Optics Express
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06 Jan 2021 14:30
Last Modified:
22 Nov 2022 09:46