Title:
TERAHERTZ GRAPHENE JOSEPHSON JUNCTION DETECTION SYSTEM BASED ON MICROWAVE RESONANT CIRCUIT READOUT
Document Type and Number:
WIPO Patent Application WO/2023/216681
Kind Code:
A1
Abstract:
Provided in the present invention is a terahertz graphene Josephson junction detection system based on a microwave resonant circuit readout, which system comprises a graphene Josephson junction detector, a microwave resonant readout circuit, a microwave network analyzer, etc., wherein the graphene Josephson junction detector and the microwave resonant readout circuit jointly constitute a microwave resonant circuit. A terahertz signal results in a change in the equivalent microwave inductance of the graphene Josephson junction detector, and further results in changes in the resonant frequency and a quality factor of the microwave resonant circuit. In the present invention, the changes in the resonant frequency and the quality factor of the microwave resonant circuit are monitored by using the microwave network analyzer, such that high-sensitivity detection of the terahertz signal is realized. In comparison with a conventional direct-current bias readout, a microwave resonant circuit readout is not affected by an external magnetic field, and has a strong anti-interference capability. In addition, the graphene Josephson junction detector and the microwave resonant readout circuit can be monolithically integrated, such that the implementation of a large-scale terahertz graphene Josephson junction array detector is easier.
Inventors:
MIAO WEI (CN)
SHI SHENGCAI (CN)
LI JING (CN)
LIN ZHENHUI (CN)
LI FEIMING (CN)
LUO QIANGHUI (CN)
SHI SHENGCAI (CN)
LI JING (CN)
LIN ZHENHUI (CN)
LI FEIMING (CN)
LUO QIANGHUI (CN)
Application Number:
PCT/CN2023/078613
Publication Date:
November 16, 2023
Filing Date:
February 28, 2023
Export Citation:
Assignee:
PURPLE MOUNTAIN OBSERVATORY CHINESE ACAD OF SCIENCES (CN)
International Classes:
G01J1/42
Foreign References:
| CN115265769A | 2022-11-01 | |||
| US20210311101A1 | 2021-10-07 | |||
| CN110763333A | 2020-02-07 | |||
| CN102473844A | 2012-05-23 | |||
| US20150372159A1 | 2015-12-24 | |||
| US20170092834A1 | 2017-03-30 |
Attorney, Agent or Firm:
NANJING ZHONGSHAN PATENT AGENT CO., LTD. (CN)
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