Apparatus for producing single strontium atoms in an optical tweezer array

doi:10.1088/1674-1056/ad84d0

中国物理B ›› 2024, Vol. 33 ›› Issue (12): 120703-120703.doi: 10.1088/1674-1056/ad84d0

Apparatus for producing single strontium atoms in an optical tweezer array

Kai Wen(文凯)^1,†, Huijin Chen(陈辉锦)^1,†, Xu Yan(颜煦)², Zejian Ren(任泽剑)¹, Chengdong He(何成东)², Elnur Hajiyev², Preston Tsz Fung Wong(黄梓峰)², and Gyu-Boong Jo^1,2,‡

1 Microelectronics Thrust, The Hong Kong University of Science and Technology (Guangzhou), Guangzhou 511455, China;
2 Department of Physics, The Hong Kong University of Science and Technology, Hong Kong 999077, China

收稿日期:2024-08-20 修回日期:2024-09-26 接受日期:2024-10-09 发布日期:2024-11-12
通讯作者: Gyu-Boong Jo E-mail:gbjo@ust.hk
基金资助:
GBJ acknowledges support from the RGC through 16306119, 16302420, 16302821, 16306321, 16306922, 16302123, C6009-20G, N-HKUST636-22, and RFS2122-6S04. KW acknowledges support from the Guangzhou and Nansha District Postdoctoral Project. CH acknowledges support from the RGC for RGC Postdoctoral fellowship.

Apparatus for producing single strontium atoms in an optical tweezer array

1 Microelectronics Thrust, The Hong Kong University of Science and Technology (Guangzhou), Guangzhou 511455, China;
2 Department of Physics, The Hong Kong University of Science and Technology, Hong Kong 999077, China

Received:2024-08-20 Revised:2024-09-26 Accepted:2024-10-09 Published:2024-11-12
Contact: Gyu-Boong Jo E-mail:gbjo@ust.hk
Supported by:
GBJ acknowledges support from the RGC through 16306119, 16302420, 16302821, 16306321, 16306922, 16302123, C6009-20G, N-HKUST636-22, and RFS2122-6S04. KW acknowledges support from the Guangzhou and Nansha District Postdoctoral Project. CH acknowledges support from the RGC for RGC Postdoctoral fellowship.

摘要/Abstract

摘要： 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 μK 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 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.

关键词: optical tweezer array, single atom, sisyphus cooling

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 $10^{8}$ s$^{-1}$ at 5 mK for the three-dimensional blue MOT. This enables us to trap $2\times10^{6}$ $^{88}$Sr atoms at 2 μK 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 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.

Key words: optical tweezer array, single atom, sisyphus cooling

中图分类号: (Atomic and molecular beam sources and detectors)

07.77.Gx

Kai Wen(文凯), Huijin Chen(陈辉锦), Xu Yan(颜煦), Zejian Ren(任泽剑), Chengdong He(何成东), Elnur Hajiyev, Preston Tsz Fung Wong(黄梓峰), and Gyu-Boong Jo. Apparatus for producing single strontium atoms in an optical tweezer array[J]. 中国物理B, 2024, 33(12): 120703-120703.

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Apparatus for producing single strontium atoms in an optical tweezer array

Apparatus for producing single strontium atoms in an optical tweezer array

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