中国物理B ›› 2017, Vol. 26 ›› Issue (7): 74204-074204.doi: 10.1088/1674-1056/26/7/074204

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

High quality electromagnetically induced transparency spectroscopy of 87Rb in a buffer gas cell with a magnetic field

Hong Cheng(成红), Han-Mu Wang(王汉睦), Shan-Shan Zhang(张珊珊), Pei-Pei Xin(辛培培), Jun Luo(罗军), Hong-Ping Liu(刘红平)   

  1. 1 State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China;
    2 University of Chinese Academy of Sciences, Beijing 100049, China
  • 收稿日期:2017-01-16 修回日期:2017-03-09 出版日期:2017-07-05 发布日期:2017-07-05
  • 通讯作者: Hong-Ping Liu E-mail:liuhongping@wipm.ac.cn
  • 基金资助:

    Project supported by the National Key Basic Research Program of China (Grant No.2013CB922003) and the National Natural Science Foundation of China (Grant Nos.91421305,91121005,11674359,and 91436106).

High quality electromagnetically induced transparency spectroscopy of 87Rb in a buffer gas cell with a magnetic field

Hong Cheng(成红)1,2, Han-Mu Wang(王汉睦)1,2, Shan-Shan Zhang(张珊珊)1,2, Pei-Pei Xin(辛培培)1,2, Jun Luo(罗军)1,2, Hong-Ping Liu(刘红平)1,2   

  1. 1 State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China;
    2 University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2017-01-16 Revised:2017-03-09 Online:2017-07-05 Published:2017-07-05
  • Contact: Hong-Ping Liu E-mail:liuhongping@wipm.ac.cn
  • Supported by:

    Project supported by the National Key Basic Research Program of China (Grant No.2013CB922003) and the National Natural Science Foundation of China (Grant Nos.91421305,91121005,11674359,and 91436106).

摘要:

We have studied the phenomenon of electromagnetically induced transparency (EIT) of 87Rb vapor with a buffer gas in a magnetic field at room temperature. It is found that the spectral lines caused by the velocity selective optical pump effects get much weaker and wider when the sample cell is mixed with a 5-Torr N2 gas while the EIT signal is kept almost unchanged. A weighted least-square fit is also developed to remove the Doppler broadening completely. This spectral method provides a way to measure the Zeeman splitting with high resolution, for example, the Λ -type EIT resonance splits into four peaks on the D2 line of 87Rb in the thermal 2-cm vapor cell with a magnetic field along the electric field of the linearly polarized coupling laser. The high-resolution spectrum can be used to lock the laser to a given frequency by tuning the magnetic field.

关键词: electromagnetically induced transparency, Zeeman effect, coherent interaction

Abstract:

We have studied the phenomenon of electromagnetically induced transparency (EIT) of 87Rb vapor with a buffer gas in a magnetic field at room temperature. It is found that the spectral lines caused by the velocity selective optical pump effects get much weaker and wider when the sample cell is mixed with a 5-Torr N2 gas while the EIT signal is kept almost unchanged. A weighted least-square fit is also developed to remove the Doppler broadening completely. This spectral method provides a way to measure the Zeeman splitting with high resolution, for example, the Λ -type EIT resonance splits into four peaks on the D2 line of 87Rb in the thermal 2-cm vapor cell with a magnetic field along the electric field of the linearly polarized coupling laser. The high-resolution spectrum can be used to lock the laser to a given frequency by tuning the magnetic field.

Key words: electromagnetically induced transparency, Zeeman effect, coherent interaction

中图分类号:  (Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)

  • 42.50.Gy
32.60.+i (Zeeman and Stark effects) 32.80.Qk (Coherent control of atomic interactions with photons) 32.70.Jz (Line shapes, widths, and shifts)