中国物理B ›› 2022, Vol. 31 ›› Issue (12): 123201-123201.doi: 10.1088/1674-1056/ac6862

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High resolution spectroscopy of Rb in magnetic field by far-detuning electromagnetically induced transparency

Zi-Shan Xu(徐子珊)1,2, Han-Mu Wang(王汉睦)2, Ming-Hao Cai(蔡明皓)1,3, Shu-Hang You(游书航)1,3, and Hong-Ping Liu(刘红平)1,3,†   

  1. 1 State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathmatics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China;
    2 National University of Defence Technology, Changsha 410073, China;
    3 University of Chinese Academy of Sciences, Beijing 100049, China
  • 收稿日期:2022-03-01 修回日期:2022-04-01 接受日期:2022-04-20 出版日期:2022-11-11 发布日期:2022-11-19
  • 通讯作者: Hong-Ping Liu E-mail:liuhongping@wipm.ac.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 12074388 and 12004393).

High resolution spectroscopy of Rb in magnetic field by far-detuning electromagnetically induced transparency

Zi-Shan Xu(徐子珊)1,2, Han-Mu Wang(王汉睦)2, Ming-Hao Cai(蔡明皓)1,3, Shu-Hang You(游书航)1,3, and Hong-Ping Liu(刘红平)1,3,†   

  1. 1 State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathmatics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China;
    2 National University of Defence Technology, Changsha 410073, China;
    3 University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2022-03-01 Revised:2022-04-01 Accepted:2022-04-20 Online:2022-11-11 Published:2022-11-19
  • Contact: Hong-Ping Liu E-mail:liuhongping@wipm.ac.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 12074388 and 12004393).

摘要: We have presented a high resolution spectroscopy of Rb in magnetic field by far-detuning electromagnetically induced transparency (EIT). The EIT spectrum in the $\Xi$-type configuration is usually companied by a double resonance optical pumping (DROP) due to the strong optical coupling between the two upper states, leading to the spectral lines seriously deformed and widely broadened for complex relaxation processes in DROP. Here we demonstrate a high resolution spectroscopy by far-detuning EIT for $^{87}\rm{Rb}$ $\rm{5S_{1/2}\rightarrow5P_{3/2}\rightarrow5D_{5/2}}$ in magnetic fields. The method of far-detuning eliminates the relaxation in DROP to the most extent and decreases the spectral linewidth from more than 20 MHz down to its natural linewidth limit (6 MHz). The deformation of the spectral lines also disappears and the observed spectra are well in accordance with the theoretical calculation. Our work shows that far-detuning EIT is a reliable high resolution spectroscopic method when the relaxation in DROP cannot be neglected, especially for the case of transition to low excited states.

关键词: Zeeman, high resolution spectroscopy, electromagnetically induced transparency, off-resonance

Abstract: We have presented a high resolution spectroscopy of Rb in magnetic field by far-detuning electromagnetically induced transparency (EIT). The EIT spectrum in the $\Xi$-type configuration is usually companied by a double resonance optical pumping (DROP) due to the strong optical coupling between the two upper states, leading to the spectral lines seriously deformed and widely broadened for complex relaxation processes in DROP. Here we demonstrate a high resolution spectroscopy by far-detuning EIT for $^{87}\rm{Rb}$ $\rm{5S_{1/2}\rightarrow5P_{3/2}\rightarrow5D_{5/2}}$ in magnetic fields. The method of far-detuning eliminates the relaxation in DROP to the most extent and decreases the spectral linewidth from more than 20 MHz down to its natural linewidth limit (6 MHz). The deformation of the spectral lines also disappears and the observed spectra are well in accordance with the theoretical calculation. Our work shows that far-detuning EIT is a reliable high resolution spectroscopic method when the relaxation in DROP cannot be neglected, especially for the case of transition to low excited states.

Key words: Zeeman, high resolution spectroscopy, electromagnetically induced transparency, off-resonance

中图分类号:  (Oscillator strengths, lifetimes, transition moments)

  • 32.70.Cs
42.50.Gy (Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption) 32.80.Qk (Coherent control of atomic interactions with photons) 32.10.Fn (Fine and hyperfine structure)