Chinese Optics Letters, 2017, 15 (5): 050203, Published Online: Jul. 23, 2018  

Two-color cesium magneto-optical trap with 6S1/2-6P3/2-7S1/2 (852  nm + 1470  nm) ladder-type system

Jie Wang 1,2Guang Yang 1,2Jun He 1,2,3Junmin Wang 1,2,3,*
Author Affiliations
1 State Key Laboratory of Quantum Optics and Quantum Optics Devices, Shanxi University, Taiyuan 030006, China
2 Institute of Opto-Electronics, Shanxi University, Taiyuan 030006, China
3 Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China
Abstract
A 1470 nm+852 nm two-color (TC) cesium (Cs) magneto-optical trap (MOT) with a 6S1/2-6P3/2-7S1/2 ladder-type system is proposed and experimentally investigated. To the best of our knowledge, it is the first report about the 1470 nm+852 nm Cs TC-MOT. One of the three pairs of the 852 nm cooling and trapping beams (CTBs) in a conventional Cs MOT is replaced with a pair of the 1470 nm CTBs. Thus, the TC-MOT partially employs the optical radiation forces from photon scattering of the 6P3/2 (F=5) 7S1/2 (F=4) excited-state transition (1470 nm). This TC-MOT can cool and trap Cs atoms on both the red- and blue-detuning sides of the two-photon resonance. This work may have applications in cooling and trapping of atoms using inconvenient wavelengths and background-free detection of cold and trapped Cs atoms.

Jie Wang, Guang Yang, Jun He, Junmin Wang. Two-color cesium magneto-optical trap with 6S1/2-6P3/2-7S1/2 (852  nm + 1470  nm) ladder-type system[J]. Chinese Optics Letters, 2017, 15(5): 050203.

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