Transient electromagnetically induced transparency spectroscopy of 87Rb atoms in buffer gas

doi:10.1088/1674-1056/ac4748

中国物理B ›› 2022, Vol. 31 ›› Issue (7): 73201-073201.doi: 10.1088/1674-1056/ac4748

Transient electromagnetically induced transparency spectroscopy of ⁸⁷Rb atoms in buffer gas

Zi-Shan Xu(徐子珊)^1,2, Han-Mu Wang(王汉睦)^1,2, Zeng-Li Ba(巴曾立)³, and Hong-Ping Liu(刘红平)^1,2,†

1 State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China;
2 University of Chinese Academy of Sciences, Beijing 100049, China;
3 School of Physical Science, University of Science and Technology of China, Hefei 230026, China

收稿日期:2021-10-16 修回日期:2021-12-24 接受日期:2021-12-31 出版日期:2022-06-09 发布日期:2022-06-13
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).

Transient electromagnetically induced transparency spectroscopy of ⁸⁷Rb atoms in buffer gas

Zi-Shan Xu(徐子珊)^1,2, Han-Mu Wang(王汉睦)^1,2, Zeng-Li Ba(巴曾立)³, and Hong-Ping Liu(刘红平)^1,2,†

1 State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China;
2 University of Chinese Academy of Sciences, Beijing 100049, China;
3 School of Physical Science, University of Science and Technology of China, Hefei 230026, China

Received:2021-10-16 Revised:2021-12-24 Accepted:2021-12-31 Online:2022-06-09 Published:2022-06-13
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/Abstract

摘要： We study the transient response dynamics of ⁸⁷Rb atomic vapor buffered in 8 torr Ne gas through an electromagnetically induced transparency configured in $\varLambda$-scheme. Experimentally, the temporal transmission spectra versus probe detuning by switching on and off the coupling one show complex structures. The transmitted probe light intensity drops to a minimum value when the coupling light turns off, showing a strong absorption. Even at the moment of turning on the coupling light at a subsequent delayed time, the atomic medium shows a fast transient response. To account for the transient switching feature, in the time-dependent optical Bloch equation, we must take the transverse relaxation dephasing process of atomic vapor into account, as well as the fluorescence relaxation along with the optical absorption. This work supplies a technique to quantify the transverse relaxation time scale and to sensitively monitor its variation along the environment by observing the transient dynamics of coherent medium, which is helpful in characterizing the coherent feature of the atomic medium.

关键词: electromagnetically induced transparency, rubidium atom, transverse relaxation rate

Abstract: We study the transient response dynamics of ⁸⁷Rb atomic vapor buffered in 8 torr Ne gas through an electromagnetically induced transparency configured in $\varLambda$-scheme. Experimentally, the temporal transmission spectra versus probe detuning by switching on and off the coupling one show complex structures. The transmitted probe light intensity drops to a minimum value when the coupling light turns off, showing a strong absorption. Even at the moment of turning on the coupling light at a subsequent delayed time, the atomic medium shows a fast transient response. To account for the transient switching feature, in the time-dependent optical Bloch equation, we must take the transverse relaxation dephasing process of atomic vapor into account, as well as the fluorescence relaxation along with the optical absorption. This work supplies a technique to quantify the transverse relaxation time scale and to sensitively monitor its variation along the environment by observing the transient dynamics of coherent medium, which is helpful in characterizing the coherent feature of the atomic medium.

Key words: electromagnetically induced transparency, rubidium atom, transverse relaxation rate

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)

Zi-Shan Xu(徐子珊), Han-Mu Wang(王汉睦), Zeng-Li Ba(巴曾立), and Hong-Ping Liu(刘红平). Transient electromagnetically induced transparency spectroscopy of ⁸⁷Rb atoms in buffer gas[J]. 中国物理B, 2022, 31(7): 73201-073201.

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Transient electromagnetically induced transparency spectroscopy of ⁸⁷Rb atoms in buffer gas

Transient electromagnetically induced transparency spectroscopy of ⁸⁷Rb atoms in buffer gas

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