Effective working regions of the grating chip for planar-integrated magneto-optics trap

doi:10.1088/1674-1056/adcb9c

中国物理B ›› 2025, Vol. 34 ›› Issue (7): 74211-074211.doi: 10.1088/1674-1056/adcb9c

Effective working regions of the grating chip for planar-integrated magneto-optics trap

Chang-Jiang Huang(黄长江)^1,2,†, Ling-Xiao Wang(王凌潇)^1,2,†, Liang Chen(陈梁)^1,2, Chuan-Feng Li(李传锋)^1,2,3, Guang-Can Guo(郭光灿)^1,2,3, Chang-Ling Zou(邹长铃)^1,2,3,‡, and Guo-Yong Xiang(项国勇)^1,2,3,§

1 Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China;
2 CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China;
3 Hefei National Laboratory, University of Science and Technology of China, Hefei 230088, China

收稿日期:2025-03-04 修回日期:2025-04-10 接受日期:2025-04-11 出版日期:2025-06-18 发布日期:2025-06-30
通讯作者: Chang-Ling Zou, Guo-Yong Xiang E-mail:clzou321@ustc.edu.cn;gyxiang@ustc.edu.cn
基金资助:
Project supported by the National Key R&D Program of China (Grant Nos. 2021YFA1402004 and 2021YFF0603701) and the National Natural Science Foundation of China (Grant Nos. 12134014, U21A20433, U21A6006, and 92265108).

Effective working regions of the grating chip for planar-integrated magneto-optics trap

1 Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China;
2 CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China;
3 Hefei National Laboratory, University of Science and Technology of China, Hefei 230088, China

Received:2025-03-04 Revised:2025-04-10 Accepted:2025-04-11 Online:2025-06-18 Published:2025-06-30
Contact: Chang-Ling Zou, Guo-Yong Xiang E-mail:clzou321@ustc.edu.cn;gyxiang@ustc.edu.cn
Supported by:
Project supported by the National Key R&D Program of China (Grant Nos. 2021YFA1402004 and 2021YFF0603701) and the National Natural Science Foundation of China (Grant Nos. 12134014, U21A20433, U21A6006, and 92265108).

摘要/Abstract

摘要： We experimentally investigate the effective working regions of a planar-integrated magneto-optical trap (MOT). By scanning a blocking point in the incident laser beam, we identify four effective working regions of the laser beam contributing to MOT: a central region corresponding to the downward incident beam and three regions associated with the upward diffracted beams. The latter three regions are the effective regions of the grating chip. It is demonstrated that only three 3.5 mm radius grating regions can produce a MOT that is capable of trapping $10^5$ atoms with a temperature below 150 μK, retaining over 60% of atoms compared to a complete grating chip. This finding suggests that more than 60% of the grating chip area can be saved for other on-chip components, such as metasurfaces and nanophotonic devices, without significantly compromising MOT performance, paving the way for more compact and versatile atom-photon interfaces.

关键词: cold atoms, grating chip, magneto-optical trap (MOT)

Abstract: We experimentally investigate the effective working regions of a planar-integrated magneto-optical trap (MOT). By scanning a blocking point in the incident laser beam, we identify four effective working regions of the laser beam contributing to MOT: a central region corresponding to the downward incident beam and three regions associated with the upward diffracted beams. The latter three regions are the effective regions of the grating chip. It is demonstrated that only three 3.5 mm radius grating regions can produce a MOT that is capable of trapping $10^5$ atoms with a temperature below 150 μK, retaining over 60% of atoms compared to a complete grating chip. This finding suggests that more than 60% of the grating chip area can be saved for other on-chip components, such as metasurfaces and nanophotonic devices, without significantly compromising MOT performance, paving the way for more compact and versatile atom-photon interfaces.

Key words: cold atoms, grating chip, magneto-optical trap (MOT)

中图分类号: (Gratings)

42.79.Dj

42.62.-b (Laser applications) 37.10.-x (Atom, molecule, and ion cooling methods) 37.10.Gh (Atom traps and guides)

Chang-Jiang Huang(黄长江), Ling-Xiao Wang(王凌潇), Liang Chen(陈梁), Chuan-Feng Li(李传锋), Guang-Can Guo(郭光灿), Chang-Ling Zou(邹长铃), and Guo-Yong Xiang(项国勇). Effective working regions of the grating chip for planar-integrated magneto-optics trap[J]. 中国物理B, 2025, 34(7): 74211-074211.

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Effective working regions of the grating chip for planar-integrated magneto-optics trap

Effective working regions of the grating chip for planar-integrated magneto-optics trap

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