中国物理B ›› 2013, Vol. 22 ›› Issue (1): 13201-013201.doi: 10.1088/1674-1056/22/1/013201

• ATOMIC AND MOLECULAR PHYSICS • 上一篇    下一篇

Analysis of atom detection via magnetic optical effect

程峰, 蒋小军, 韩景珊, 林锦达, 王育竹   

  1. The Laboratory of Quantum Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China Center for Cold Atom Physics, Chinese Academy of Sciences, Shanghai 201800, China
  • 收稿日期:2012-04-16 修回日期:2012-07-05 出版日期:2012-12-01 发布日期:2012-12-01
  • 基金资助:
    Project supported by the National Basic Research Program of China (Grant No. 2011CB921504) and the National Natural Science Foundation of China (Grant No. 10974210).

Analysis of atom detection via magnetic optical effect

Cheng Feng (程峰), Jiang Xiao-Jun (蒋小军), Han Jing-Shan (韩景珊), Lin Jin-Da (林锦达), Wang Yu-Zhu (王育竹)   

  1. The Laboratory of Quantum Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China Center for Cold Atom Physics, Chinese Academy of Sciences, Shanghai 201800, China
  • Received:2012-04-16 Revised:2012-07-05 Online:2012-12-01 Published:2012-12-01
  • Contact: Wang Yu-Zhu E-mail:yzwang@mail.shcnc.ac.cn
  • Supported by:
    Project supported by the National Basic Research Program of China (Grant No. 2011CB921504) and the National Natural Science Foundation of China (Grant No. 10974210).

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摘要： We demonstrated a new method of atom detection by means of magnetic optical effect. The number density of the atom cloud was measured by detecting the rotation angle of the polarization plane of linearly polarized probe light when propagating inside the atomic cloud. Detuning, magnetic field, and light intensity dependencies of the rotation angle were studied theoretically and experimentally to find the best parameter for atom detection. In this way, we managed to achieve a rotation angle of 0.22 rad with a signal to noise ratio (SNR) of 75 and a contrast of 87.5%.

关键词: atom detection, magnetic optical effect, Faraday rotation

Abstract: We demonstrated a new method of atom detection by means of magnetic optical effect. The number density of the atom cloud was measured by detecting the rotation angle of the polarization plane of linearly polarized probe light when propagating inside the atomic cloud. Detuning, magnetic field, and light intensity dependencies of the rotation angle were studied theoretically and experimentally to find the best parameter for atom detection. In this way, we managed to achieve a rotation angle of 0.22 rad with a signal to noise ratio (SNR) of 75 and a contrast of 87.5%.

Key words: atom detection, magnetic optical effect, Faraday rotation

中图分类号:  (Atomic spectra?)

  • 32.30.-r
32.60.+i (Zeeman and Stark effects) 32.70.-n (Intensities and shapes of atomic spectral lines)