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A high spatial resolution photodetector is designed and realized using a newly developed two-sided nanoscale three-dimensional fabrication technique. Two types of nanophotodetectors with slab and channel structures are fabricated and characterized. By comparison, nanophotodetectors with channel structures show a 10 times lower dark current, higher detection resolution, and signal-to-noise ratio than...
A novel near-field nano-imaging device based on nanophotodetector (NPD) array is presented. Simulation shows the smallest obtainable resolution is 150 nm for 1.55 mum wavelength. Various photolithography, e-beam lithography, wafer bonding and etching back techniques have been developed to realize the thin-film based photodetector structures. A slab version NPD device has been successfully fabricated...
A novel near-field nano-imager based on nanophotodetector (NPD) array is presented. Simulation shows lambda/10 resolution could be obtained by NPD array. The initially realized NPD devices at 1.5 mum wavelength have the smallest pixel size of 50 nm.
Simulation of detecting photoelectrons using FDTD method with an application to near-field subwavelength imaging based on nanoscale semiconductor photodetector array is reported. Spatial distributions for the electric field and photoelectron density have been obtained and the photocurrents from the photoelectrons have been calculated for the nanoscale photodetector array. The resolution of this novel...
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