Infrared photodetector with wavelength extension beyond the spectral  limit

A. G. Unil Perera; Dilip Chauhan; Yan-Feng Lao; Lianhe Li; Suraj P. Khanna; Edmund H. Linfield

doi:10.1117/12.2225264

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12 May 2016 Infrared photodetector with wavelength extension beyond the spectral limit

A. G. Unil Perera, Dilip Chauhan, Yan-Feng Lao, Lianhe Li, Suraj P. Khanna, Edmund H. Linfield

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Proceedings Volume 9844, Automatic Target Recognition XXVI; 98440X (2016) https://doi.org/10.1117/12.2225264
Event: SPIE Defense + Security, 2016, Baltimore, Maryland, United States

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 (λ^t) 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.

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A. G. Unil Perera, Dilip Chauhan, Yan-Feng Lao, Lianhe Li, Suraj P. Khanna, and Edmund H. Linfield "Infrared photodetector with wavelength extension beyond the spectral limit", Proc. SPIE 9844, Automatic Target Recognition XXVI, 98440X (12 May 2016); https://doi.org/10.1117/12.2225264

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