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A novel lateral infrared photodetector was demonstrated using 3-D structures comprising of zinc-oxide nanowire (NW) cores and hydrogenated amorphous silicon (a-Si:H) thin-film shell. The 3-D infrared photodetectors showed a low dark current of ~10−11–10−12 A and ~102–103 light-on/light-off ratio with both constant and pulsed 1.55-$\mu \text{m}$ wavelength light. A vertically integrated infrared...
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