| CPC G01R 33/0354 (2013.01) [G01R 33/323 (2013.01); H10N 60/12 (2023.02); H10N 60/805 (2023.02)] | 4 Claims |
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1. A terahertz graphene Josephson junction detection system, comprising a graphene Josephson junction detector, a microwave resonant readout circuit, a microwave network analyzer, and a low temperature refrigerator, wherein the graphene Josephson junction detector is electrically connected to the microwave resonant readout circuit to form a microwave resonant circuit; the graphene Josephson junction detector is heated by a signal to be detected, and by changing an equivalent microwave inductance of the graphene Josephson junction detector, a resonant frequency and a quality factor of the microwave resonant circuit are changed; the microwave network analyzer is connected to the microwave resonant readout circuit, and configured to monitor the resonant frequency and the quality factor of the microwave resonant circuit, thereby realizing detection on the signal to be detected; and the low temperature refrigerator provides a low temperature working environment for the graphene Josephson junction detector and the microwave resonant readout circuit; wherein
the graphene Josephson junction detector comprises a silicon lens and a graphene Josephson junction detector chip, the graphene Josephson junction detector chip comprises a planar antenna and a graphene microbridge, and the signal to be detected is coupled to the graphene microbridge through the silicon lens and the planar antenna; and
the planar antenna is made of a superconducting material, and the planar antenna serves as a superconducting electrode of the graphene microbridge, and forms a superconductor-graphene-superconductor Josephson structure with the graphene microbridge.
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