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