论文信息 - Infrared photodetector with wavelength extension beyond the spectral limit

Infrared photodetector with wavelength extension beyond the spectral limit

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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