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Chin. Phys. B, 2019, Vol. 28(1): 013702    DOI: 10.1088/1674-1056/28/1/013702

Effect of external magnetic field on the shift of resonant frequency in photoassociation of ultracold Cs atoms

Pengwei Li(李鹏伟)1, Yuqing Li(李玉清)1,2, Guosheng Feng(冯国胜)1, Jizhou Wu(武寄洲)1,2, Jie Ma(马杰)1,2, Liantuan Xiao(肖连团)1,2, Suotang Jia(贾锁堂)1,2
1 State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, College of Physics and Electronics Engineering, Shanxi University, Taiyuan 030006, China;
2 Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China

We study the influence of external magnetic field on the shift of the resonant frequency in the photoassociation of ultracold Cs atoms, which are captured in a magnetically levitated optical crossed dipole trap. With the increase of the photoassociation laser intensity, the linear variation of the frequency shift is measured by recording the photoassociation spectra of the long-range 0u+ state of Cs molecule below the 6S1/2+6P1/2 dissociation limit at different magnetic fields. The slope of the frequency shift to the intensity of the photoassociation laser exhibits a strong dependence on the external magnetic field. The experimental data is simulated with an analytic theory model, in which a single channel rectangular potential with the tunable well depth is introduced to acquire the influence of the magnetic field on the atomic behavior in the effective range where photoassociation occurs.

Keywords:  ultracold molecule      photoassociation      frequency shift  
Received:  27 September 2018      Revised:  22 November 2018      Published:  05 January 2019
PACS:  37.10.Pq (Trapping of molecules)  
  37.10.Mn (Slowing and cooling of molecules)  
  33.70.Jg (Line and band widths, shapes, and shifts)  

Project supported by the National Key Research and Development Program of China (Grant No. 2017YFA0304203), the Chang Jiang Scholars and Innovative Research Team in the University of the Ministry of Education of China (Grant No. IRT13076), the National Natural Science Foundation of China (Grant Nos. 61722507, 61675121, 61705123, and 11434007), the Fund for Shanxi 1331 Project Key Subjects Construction, China, and the Applied Basic Research Project of Shanxi Province, China (Grant No. 201701D221002).

Corresponding Authors:  Yuqing Li     E-mail:

Cite this article: 

Pengwei Li(李鹏伟), Yuqing Li(李玉清), Guosheng Feng(冯国胜), Jizhou Wu(武寄洲), Jie Ma(马杰), Liantuan Xiao(肖连团), Suotang Jia(贾锁堂) Effect of external magnetic field on the shift of resonant frequency in photoassociation of ultracold Cs atoms 2019 Chin. Phys. B 28 013702

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