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

doi:10.1088/1674-1056/26/9/099501

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 4S_{1/2, m= 1/2}→3D_{5/2, 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
Accepted manuscript online:

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

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