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