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
Abstract
A 1470 nm + 852 nm two-color (TC) cesium (Cs) magneto-optical trap (MOT) with a 6 S 1 / 2 - 6 P 3 / 2 - 7 S 1 / 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 6 P 3 / 2 (F ′ = 5 ) 7 S 1 / 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.