中国物理B ›› 2013, Vol. 22 ›› Issue (3): 33202-033202.doi: 10.1088/1674-1056/22/3/033202

• ATOMIC AND MOLECULAR PHYSICS • 上一篇    下一篇

Linewidth of electromagnetically induced transparency under motional averaging in coated vapor cell

徐智翔a, 曲伟智a, 高然b, 胡新华b, 肖艳红a   

  1. a Department of Physics, State Key Laboratory of Surface Physics, Laboratory of Advanced Materials, and Key Laboratory of Micro and Nano Photonic Structures of Ministry of Education, Fudan University, Shanghai 200433, China;
    b Department of Material Science, Fudan University, Shanghai 200433, China
  • 收稿日期:2012-10-12 修回日期:2012-11-30 出版日期:2013-02-01 发布日期:2013-02-01
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 61078013 and J1103204), the Shanghai Pujiang Program, China (Grant No. 10PJ1401400), the National Basic Research Program of China (Grant Nos. 2011CB921604 and 2012CB921604), and the Fudan University, China.

Linewidth of electromagnetically induced transparency under motional averaging in coated vapor cell

Xu Zhi-Xiang (徐智翔)a, Qu Wei-Zhi (曲伟智)a, Gao Ran (高然)b, Hu Xin-Hua (胡新华)b, Xiao Yan-Hong (肖艳红)a   

  1. a Department of Physics, State Key Laboratory of Surface Physics, Laboratory of Advanced Materials, and Key Laboratory of Micro and Nano Photonic Structures of Ministry of Education, Fudan University, Shanghai 200433, China;
    b Department of Material Science, Fudan University, Shanghai 200433, China
  • Received:2012-10-12 Revised:2012-11-30 Online:2013-02-01 Published:2013-02-01
  • Contact: Xiao Yan-Hong E-mail:yxiao@fudan.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 61078013 and J1103204), the Shanghai Pujiang Program, China (Grant No. 10PJ1401400), the National Basic Research Program of China (Grant Nos. 2011CB921604 and 2012CB921604), and the Fudan University, China.

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摘要： The linewidth of electromagnetically induced transparency (EIT) in a coated Rb vapor cell was studied under a magnetic field gradient. The nonlinear broadening of the EIT linewidth with the magnetic field gradient was observed. It was found that the motional averaging of the field gradient was more pronounced at higher laser intensities and larger beam sizes. In the same regime, there was a small linewidth decrease with the increasing magnetic field gradient. We have established a Monte-Carlo model, which gave results in good qualitative agreement with our experiment. Physics pictures for the above phenomena were also suggested. These results provide an understanding of the EIT linewidth behavior under the motional averaging, and should be useful for applications in quantum optics and metrology based on coated vapor cells.

关键词: electromagnetically induced transparency, coated cell, linewidth, motional averaging

Abstract: The linewidth of electromagnetically induced transparency (EIT) in a coated Rb vapor cell was studied under a magnetic field gradient. The nonlinear broadening of the EIT linewidth with the magnetic field gradient was observed. It was found that the motional averaging of the field gradient was more pronounced at higher laser intensities and larger beam sizes. In the same regime, there was a small linewidth decrease with the increasing magnetic field gradient. We have established a Monte–Carlo model, which gave results in good qualitative agreement with our experiment. Physics pictures for the above phenomena were also suggested. These results provide an understanding of the EIT linewidth behavior under the motional averaging, and should be useful for applications in quantum optics and metrology based on coated vapor cells.

Key words: electromagnetically induced transparency, coated cell, linewidth, motional averaging

中图分类号:  (Line shapes, widths, and shifts)

  • 32.70.Jz
32.80.Qk (Coherent control of atomic interactions with photons) 42.50.Gy (Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption) 42.62.Fi (Laser spectroscopy)