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Chin. Phys. B, 2017, Vol. 26(9): 099501    DOI: 10.1088/1674-1056/26/9/099501
GEOPHYSICS, ASTRONOMY, AND ASTROPHYSICS Prev  

Relationship measurement between ac-Stark shift of 40Ca+ clock transition and laser polarization direction

Hong-Fang Song(宋红芳)1,2,3,4, Shao-Long Chen(陈邵龙)1,2,3,4, Meng-Yan Zeng(曾孟彦)1,2,3,4, Yao Huang(黄垚)1,2,3, Hu Shao(邵虎)1,2,3,4, Yong-Bo Tang(唐永波)5, Hua Guan(管桦)1,2,3, Ke-Lin Gao(高克林)1,2,3
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 Key Laboratory of Atomic Frequency Standards, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China;
3 Center for Cold Atom Physics, Chinese Academy of Sciences, Wuhan 430071, China;
4 University of Chinese Academy of Sciences, Beijing 100049, China;
5 College of Physics and Materials Science, Henan Normal University, Xinxiang 453007, China
Abstract  

Ac-Stark shift of atom levels is caused by an ac-electromagnetic field. As an electromagnetic wave, laser light does induce ac-Stark shift. It is proved experimentally that if the light is linearly polarized, the dynamic polarizability changes with polarization direction. The polarization direction of the linearly-polarized laser is tuned by 720°, and the ac-Stark shifts of the 4S1/2, m= 1/2→3D5/2, m= 1/2 clock transitions in 40Ca+ are measured in steps of 10°. The frequency shifts change with laser polarization in a periodical manner and have values opposite to each other.

Keywords:  clock transition      ac-Stark shift      laser polarization direction  
Received:  04 April 2017      Revised:  23 May 2017      Published:  05 September 2017
PACS:  95.55.Sh (Auxiliary and recording instruments; clocks and frequency standards)  
  76.70.Fz (Double nuclear magnetic resonance (DNMR), dynamical nuclear polarization)  
  29.27.Hj (Polarized beams)  
Fund: 

Project supported by the National Natural Science Foundation of China (Grant Nos. 91336211, 11634013, 11622434, 11474318, and 11504094) and the Chinese Academy of Sciences (Grant No. XDB21030000).

Corresponding Authors:  Lin Gao     E-mail:  klgao@wipm.ac.cn

Cite this article: 

Hong-Fang Song(宋红芳), Shao-Long Chen(陈邵龙), Meng-Yan Zeng(曾孟彦), Yao Huang(黄垚), Hu Shao(邵虎), Yong-Bo Tang(唐永波), Hua Guan(管桦), Ke-Lin Gao(高克林) Relationship measurement between ac-Stark shift of 40Ca+ clock transition and laser polarization direction 2017 Chin. Phys. B 26 099501

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