期刊
IEEE PHOTONICS TECHNOLOGY LETTERS
卷 23, 期 14, 页码 935-937出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2011.2135341
关键词
Focal plane array; quantum-dot infrared photodetector (QDIP); surface plasma wave
资金
- Air Force Office of Scientific Research
Plasmonic enhancement of a quantum-dot infrared photodetector (QDIP) using a corrugated metal surface (CMS) that is fully compatible with conventional focal plane array manufacturing is demonstrated. A CMS consisting of a 2.5-mu m period, 2-D square array of 1.1-mu m-high GaAs circular posts passivated with a thick Au film is fabricated into the heavily doped, top GaAs contact layer of an InAs QDIP. For substrate-side illumination, the CMS exhibits strong coupling to surface plasma waves bound to the Au/GaAs interface providing enhancement of the QDIP. At 77 K, the CMS-processed QDIP exhibits up to similar to 15-fold detectivity enhancement compared with the original detector.
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