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Proceedings Paper

Recent developments in interband cascade infrared photodetectors
Author(s): Hossein Lotfi; Lu Li; Lin Lei; Hao Ye; SM Shazzad Rassel; Yuchao Jiang; Rui Q. Yang; John F. Klem; Tetsuya D. Mishima; Michael B. Santos; Matthew B. Johnson; James A. Gupta
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Paper Abstract

We investigate high-temperature and high-frequency operation of interband cascade infrared photodetectors (ICIPs)-two critical properties. Short-wavelength ICIPs with a cutoff wavelength of 2.9 μm had Johnson-noise limited detectivity of 5.8×109 cmHz1/2/W at 300 K, comparable to the commercial Hg1-xCdxTe photodetectors of similar wavelengths. A simple but effective method to estimate the minority carrier diffusion length in short-wavelength ICIPs is introduced. Using this approach, the diffusion length was estimated to be significantly shorter than 1 μm at high temperatures, indicating the importance of a multiple-stage photodetector (e.g., ICIPs) at high temperatures. Recent investigations on the high-frequency operation of mid-wavelength ICIPs (λc=4.3 μm) are discussed. These photodetectors had 3-dB bandwidths up to 1.3 GHz with detectivities exceeding 1x109 cmHz1/2/W at room temperature. These results validate the ability of ICIPs to achieve high bandwidths with large sensitivity and demonstrate the great potential for applications such as: heterodyne detection, and free-space optical communication.

Paper Details

Date Published: 20 May 2016
PDF: 9 pages
Proc. SPIE 9819, Infrared Technology and Applications XLII, 98190Q (20 May 2016); doi: 10.1117/12.2235086
Show Author Affiliations
Hossein Lotfi, The Univ. of Oklahoma (United States)
Lu Li, The Univ. of Oklahoma (United States)
Lin Lei, The Univ. of Oklahoma (United States)
Hao Ye, The Univ. of Oklahoma (United States)
SM Shazzad Rassel, The Univ. of Oklahoma (United States)
Yuchao Jiang, The Univ. of Oklahoma (United States)
Rui Q. Yang, The Univ. of Oklahoma (United States)
John F. Klem, Sandia National Labs. (United States)
Tetsuya D. Mishima, The Univ. of Oklahoma (United States)
Michael B. Santos, The Univ. of Oklahoma (United States)
Matthew B. Johnson, The Univ. of Oklahoma (United States)
James A. Gupta, National Research Council of Canada (Canada)

Published in SPIE Proceedings Vol. 9819:
Infrared Technology and Applications XLII
Bjørn F. Andresen; Gabor F. Fulop; Charles M. Hanson; Paul R. Norton, Editor(s)

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