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Polarization impact on sensitivity of Rydberg atom-based microwave sensors |
| Minghao Cai(蔡明皓)1,2, Aomao Wei(魏奥贸)1, Shanshan Chen(陈珊珊)1, and Yuming Huang(黄聿铭)1,† |
1 College of Photoelectronic Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China;
2 Chongqing Integrated Circuit Collaborative Innovation Center, Chongqing 401332, China |
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Abstract We investigate the sensitivity of a Rydberg atom-based microwave sensor under two polarization configurations as a function of local oscillator (LO) microwave field strength. By employing parallel and perpendicular alignments of laser and microwave polarizations in our experimental setup, we study the Autler-Townes (AT) splitting spectrum and optical response of probe transmission, and analyze their sensing effects. The results show that the parallel polarization configuration offers higher gain and better sensitivity than the perpendicular configuration. We achieve a sensitivity of 4.150(69) $\mathrm{nV}\cdot {\mathrm{cm}}^{-1}\cdot {\mathrm{Hz}}^{-1/2}$ at an LO microwave field strength of 1.74 mV/cm. This work demonstrates the significant role of polarization alignment on the performance of Rydberg atom-based microwave sensors.
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Received: 19 December 2024
Revised: 25 March 2025
Accepted manuscript online: 24 April 2025
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PACS:
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32.80.Ee
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(Rydberg states)
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42.50.Gy
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(Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)
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07.57.Kp
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(Bolometers; infrared, submillimeter wave, microwave, and radiowave receivers and detectors)
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| Fund: Project supported by the Natural Science Foundation of Chongqing, China (Grant Nos. CSTB2024NSCQMSX0880 and CSTB2024NSCQ-MSX1187) and the Fund from Chongqing University of Posts and Telecommunications (Grants Nos. A2024-33 and A2023-54). |
Corresponding Authors:
Yuming Huang
E-mail: huangym@cqupt.edu.cn
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Cite this article:
Minghao Cai(蔡明皓), Aomao Wei(魏奥贸), Shanshan Chen(陈珊珊), and Yuming Huang(黄聿铭) Polarization impact on sensitivity of Rydberg atom-based microwave sensors 2025 Chin. Phys. B 34 083201
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