Abstract
We outline an experimental setup for efficiently preparing a tweezer array of 88 Sr atoms.Our setup uses permanent magnets to maintain a steady-state two-dimensional magneto-optical trap(MOT)which results in a loading rate of up to 108 s-1 at 5 mK for the three-dimensional blue MOT.This enables us to trap 2 × 106 88Sr atoms at 2 µK in a narrow-line red MOT with the 1 S0 → 3P1 intercombination transition at 689 nm.With the Sisyphus cooling and pairwise loss processes,single atoms are trapped and imaged in 813 nm optical tweezers,exhibiting a lifetime of 2.5 min.We further investigate the survival fraction of a single atom in the tweezers and characterize the optical tweezer array using a release and recapture technique.Our experimental setup serves as an excellent reference for those engaged in experiments involving optical tweezer arrays,cold atom systems,and similar research.
维普
万方数据