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

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