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Microwave field sensor based on cold cesium Rydberg three-photon electromagnetically induced spectroscopy |
| Yuan-Yuan Wu(吴圆圆)1, Yun-Hui He(何云辉)1, Yue-Chun Jiao(焦月春)1,2,†, and Jian-Ming Zhao(赵建明)1,2,‡ |
1 State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan 030006, China;
2 Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China |
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Abstract We present the electromagnetically induced transparency (EIT) spectra of cold Rydberg four-level cascade atoms consisting of the $6{\rm S}_{1/2} \to 6{\rm P}_{3/2} \to 7{\rm S}_{1/2} \to 60{\rm P}_{3/2}$ scheme. A coupling laser drives the Rydberg transition, a dressing laser couples two intermediate levels and a weak probe laser probes the EIT signal. We numerically solve the Bloch equations and investigate the dependence of the probe transmission rate signal on the coupling and dressing lasers. We find that the probe transmission rate can display an EIT or electromagnetically induced absorption (EIA) profile, depending on the Rabi frequencies of the coupling and dressing lasers. When we increase the Rabi frequency of the coupling laser and keep the Rabi frequency of the probe and dressing laser fixed, flipping of the EIA to EIT spectrum occurs at the critical coupling Rabi frequency. When we apply a microwave field coupling the transition 60${\rm P}_{3/2} \to 61{\rm S}_{1/2}$, the EIT spectrum shows Autler-Townes splitting, which is employed to measure the microwave field. The theoretical measurement sensitivity can be 1.52$\times10^{-2}$ nV$\cdot$cm$^{-1}\cdot$Hz$^{-1/2}$ at the EIA-EIT flipping point.
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Received: 02 July 2024
Revised: 28 August 2024
Accepted manuscript online: 30 August 2024
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PACS:
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32.80.Ee
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(Rydberg states)
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32.30.Bv
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(Radio-frequency, microwave, and infrared spectra)
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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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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. U2341211, 62175136, 12241408, and 12120101004), the Innovation Program for Quantum Science and Technology (Grant No. 2023ZD0300902), the Fundamental Research Program of Shanxi Province (Grant No. 202303021224007), and the 1331 Project of Shanxi Province. |
Corresponding Authors:
Yue-Chun Jiao, Jian-Ming Zhao
E-mail: ycjiao@sxu.edu.cn;zhaojm@sxu.edu.cn
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Cite this article:
Yuan-Yuan Wu(吴圆圆), Yun-Hui He(何云辉), Yue-Chun Jiao(焦月春), and Jian-Ming Zhao(赵建明) Microwave field sensor based on cold cesium Rydberg three-photon electromagnetically induced spectroscopy 2024 Chin. Phys. B 33 113201
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