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JOSEPHSON JUNCTION READOUT FOR GRAPHENE-BASED SINGLE PHOTON DETECTOR
JOSEPHSON JUNCTION READOUT FOR GRAPHENE-BASED SINGLE PHOTON DETECTOR
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机译:基于石墨烯的单光子探测器的JOSEPHSON结读数
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摘要
A detector for detecting single photons of infrared radiation or longer wavelength electromagnetic radiation. In one embodiment a waveguide configured to transmit infrared radiation is arranged to be adjacent a graphene sheet and configured so that evanescent waves from the waveguide overlap the graphene sheet. In other embodiments a transmission line or antenna is coupled to the graphene sheet and guides longer-wavelength photons to the graphene sheet. A photon absorbed by the graphene sheet heats the graphene sheet. Part of the graphene sheet is part of the Josephson junction as the weak link, and a constant bias current is driven through the Josephson junction; an increase in the temperature of the graphene sheet results in a decrease in the critical current of the Josephson junction and a voltage pulse in the voltage across the Josephson junction. The voltage pulse is detected by the pulse detector.
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