双极化太赫兹谐振探测单元及阵列式探测装置
By constructing a dual-polarized terahertz resonant detector unit and utilizing a superconducting quantum capacitor detector unit and a Josephson junction, the sensitivity of the terahertz detector was improved, enabling the detection and imaging of a single terahertz photon.
CN117537939BActive Publication Date: 2026-07-17NANJING UNIV
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- NANJING UNIV
- Filing Date
- 2023-11-22
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
Existing terahertz detectors are not sensitive enough to effectively detect individual terahertz photons.
Method used
A dual-polarized terahertz resonant detection unit is adopted, including a resonant unit and a superconducting quantum capacitor detection unit. By utilizing a superconducting island, Josephson junction and quasi-particle library, the resonant unit is connected through a gate capacitor to construct a microcapacitor and a microinductor, forming an array of resonant frequencies in an arithmetic sequence, thereby improving the detection sensitivity.
Benefits of technology
It achieves extremely high sensitivity terahertz single-photon detection and imaging, and is capable of detecting extremely weak dual-polarized terahertz signals.
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Figure CN117537939B_ABST
Abstract
本发明公开了双极化太赫兹谐振探测单元及阵列式探测装置。其中，谐振探测单元包括谐振单元和超导量子电容探测单元。超导量子电容探测单元包括超导岛、约瑟夫森结和准粒子库。超导岛通过栅极电容器连接谐振单元。准粒子库包括吸收器和中间臂。吸收器包括北向连接臂、南向连接臂和连接于在北向连接臂和南向连接臂之间的若干十字单元串。十字单元串由若干十字单元串接而成。北向连接臂通过中间臂和约瑟夫森结连接超导岛。本发明利用准粒子隧穿、库伦阻碍以及量子电容效应来探测超导岛电荷数奇偶态，能够对极其微弱的双极化太赫兹信号进行探测，具有高吸收效率和高灵敏度优点，甚至能够进行太赫兹单光子探测、计数和成像。
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