Apparatus for producing single strontium atoms in an optical tweezer array

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 \(10^{8}\) s\(^{-1}\) at 5 mK for the three-dimensional blue MOT. This enables us to trap \(2\times10^{6}\) \(^{88}\)Sr atoms at 2 \(\mu\)K in a narrow-line red MOT with the \(^{1}\)S\(_{0}\) \(\rightarrow\) \(^{3}\)P\(_{1}\) 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 minutes. 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 platform paves the way for potential applications in atomic clocks, precision measurements, and quantum simulations.