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Proceedings Paper

Infrared photodetector with wavelength extension beyond the spectral limit
Author(s): A. G. Unil Perera; Dilip Chauhan; Yan-Feng Lao; Lianhe Li; Suraj P. Khanna; Edmund H. Linfield
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Paper Abstract

A novel concept utilizing a hot-carrier effect based on carrier interactions is achieved to extend the wavelength of the photodetector’s spectral response. A detector with a designed wavelength threshold (λt) at 3.1 μm displays two different extended thresholds at different temperatures. A very-long wavelength infrared response up to 55 μm was observed up to 35 K; while a threshold wavelength of 8.9 μm was observed in the temperature range 60K − 90K. Response tuning is implemented via varying the degree of hot-hole injection.

Paper Details

Date Published: 12 May 2016
PDF: 7 pages
Proc. SPIE 9844, Automatic Target Recognition XXVI, 98440X (12 May 2016); doi: 10.1117/12.2225264
Show Author Affiliations
A. G. Unil Perera, Georgia State Univ. (United States)
Dilip Chauhan, Georgia State Univ. (United States)
Yan-Feng Lao, Georgia State Univ. (United States)
Lianhe Li, Univ. of Leeds (United Kingdom)
Suraj P. Khanna, Univ. of Leeds (United Kingdom)
Edmund H. Linfield, Univ. of Leeds (United Kingdom)

Published in SPIE Proceedings Vol. 9844:
Automatic Target Recognition XXVI
Firooz A. Sadjadi; Abhijit Mahalanobis, Editor(s)

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