中国物理B ›› 2020, Vol. 29 ›› Issue (3): 33201-033201.doi: 10.1088/1674-1056/ab6c49

• SPECIAL TOPIC—Recent advances in thermoelectric materials and devices • 上一篇    下一篇

Precise measurement of a weak radio frequency electric field using a resonant atomic probe

Liping Hao(郝丽萍), Yongmei Xue(薛咏梅), Jiabei Fan(樊佳蓓), Jingxu Bai(白景旭), Yuechun Jiao(焦月春), Jianming Zhao(赵建明)   

  1. 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
  • 收稿日期:2019-11-26 修回日期:2020-01-09 出版日期:2020-03-05 发布日期:2020-03-05
  • 通讯作者: Jianming Zhao E-mail:zhaojm@sxu.edu.cn
  • 基金资助:
    Project supported by the National Key R&D Program of China (Grant No. 2017YFA0304203), the National Natural Science Foundation of China (Grant Nos. 61475090, 61675123, 61775124, and 11804202), the State Key Program of National Natural Science of China (Grant Nos. 11434007 and 61835007), and Changjiang Scholars and Innovative Research Team in University of Ministry of Education of China (Grant No. IRT_17R70).

Precise measurement of a weak radio frequency electric field using a resonant atomic probe

Liping Hao(郝丽萍)1, Yongmei Xue(薛咏梅)1, Jiabei Fan(樊佳蓓)1, Jingxu Bai(白景旭)1, Yuechun Jiao(焦月春)1,2, Jianming Zhao(赵建明)1,2   

  1. 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
  • Received:2019-11-26 Revised:2020-01-09 Online:2020-03-05 Published:2020-03-05
  • Contact: Jianming Zhao E-mail:zhaojm@sxu.edu.cn
  • Supported by:
    Project supported by the National Key R&D Program of China (Grant No. 2017YFA0304203), the National Natural Science Foundation of China (Grant Nos. 61475090, 61675123, 61775124, and 11804202), the State Key Program of National Natural Science of China (Grant Nos. 11434007 and 61835007), and Changjiang Scholars and Innovative Research Team in University of Ministry of Education of China (Grant No. IRT_17R70).

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摘要： We present a precise measurement of a weak radio frequency electric field with a frequency of ≤3 GHz employing a resonant atomic probe that is constituted with a Rydberg cascade three-level atom, including a cesium ground state |6S1/2>, an excited state |6P3/2>, and Rydberg state |nD5/2>. Two radio frequency (RF) electric fields, noted as local and signal fields, couple the nearby Rydberg transition. The two-photon resonant Rydberg electromagnetically induced transparency (Rydberg-EIT) is employed to directly read out the weak signal field having hundreds of kHz difference between the local and signal fields that is encoded in the resonant microwave-dressed Rydberg atoms. The minimum detectable signal fields of ESmin=1.36 ±0.04 mV/m for 2.18 GHz coupling |68D5/2>→|69P3/2> transition and 1.33±0.02 mV/m for 1.32 GHz coupling |80D5/2>→|81P3/2> transition are obtained, respectively. The bandwidth dependence is also investigated by varying the signal field frequency and corresponding -3 dB bandwidth of 3 MHz is attained. This method can be employed to perform a rapid and precise measurement of the weak electric field, which is important for the atom-based microwave metrology.

关键词: Rydberg electromagnetically induced transparency (Rydberg-EIT), atomic probe, weak field measurement

Abstract: We present a precise measurement of a weak radio frequency electric field with a frequency of ≤3 GHz employing a resonant atomic probe that is constituted with a Rydberg cascade three-level atom, including a cesium ground state |6S1/2>, an excited state |6P3/2>, and Rydberg state |nD5/2>. Two radio frequency (RF) electric fields, noted as local and signal fields, couple the nearby Rydberg transition. The two-photon resonant Rydberg electromagnetically induced transparency (Rydberg-EIT) is employed to directly read out the weak signal field having hundreds of kHz difference between the local and signal fields that is encoded in the resonant microwave-dressed Rydberg atoms. The minimum detectable signal fields of ESmin=1.36 ±0.04 mV/m for 2.18 GHz coupling |68D5/2>→|69P3/2> transition and 1.33±0.02 mV/m for 1.32 GHz coupling |80D5/2>→|81P3/2> transition are obtained, respectively. The bandwidth dependence is also investigated by varying the signal field frequency and corresponding -3 dB bandwidth of 3 MHz is attained. This method can be employed to perform a rapid and precise measurement of the weak electric field, which is important for the atom-based microwave metrology.

Key words: Rydberg electromagnetically induced transparency (Rydberg-EIT), atomic probe, weak field measurement

中图分类号:  (Rydberg states)

  • 32.80.Ee
42.50.Gy (Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption) 84.40.-x (Radiowave and microwave (including millimeter wave) technology)