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- W2976767140 abstract "Many consumer technologies and scientific methods rely on photodetection of infrared light. We report a Schottky photodetector operating below silicon's band gap energy, through hot carrier injection from a nanoscale metallic absorber. Our design relies on simple CMOS-compatible 'bottom up' fabrication of fractally nanostructured aluminium films. Due to the fractal nature of the nanostructuring, the aluminium films support plasmonically enhanced absorption over a wide wavelength range. We demonstrate two orders of magnitude improvements of responsivity, noise-equivalent-power, and detectivity as compared to bulk metal, over a broad spectral and angular range. We attribute this to momentum relaxation processes from the nanoscale fractal geometry. Specifically, we demonstrate a direct link between quantum efficiency enhancement and structural parameters such as perimeter to surface ratio. Finally, our devices also function as bulk refractive index sensors. Our approach is a promising candidate for future cost effective and robust short wave infrared photodetection and sensing applications." @default.
- W2976767140 created "2019-10-03" @default.
- W2976767140 creator A5014032344 @default.
- W2976767140 date "2020-01-01" @default.
- W2976767140 modified "2023-09-27" @default.
- W2976767140 title "Giant enhancement of silicon plasmonic SWIR photodetection using nanoscale self-organised metallic films" @default.
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- W2976767140 doi "https://doi.org/10.6084/m9.figshare.c.4683773.v1" @default.
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