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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 |
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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.
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Received: 16 October 2021
Revised: 24 December 2021
Accepted manuscript online: 31 December 2021
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PACS:
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32.70.Cs
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(Oscillator strengths, lifetimes, transition moments)
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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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32.80.Qk
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(Coherent control of atomic interactions with photons)
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32.10.Fn
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(Fine and hyperfine structure)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 12074388 and 12004393). |
Corresponding Authors:
Hong-Ping Liu
E-mail: liuhongping@wipm.ac.cn
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Cite this article:
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 2022 Chin. Phys. B 31 073201
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