Characterization of nonlinear spectral linewidth and light shift in diffuse laser-cooled atoms

doi:10.1088/1674-1056/ad990f

中国物理B ›› 2025, Vol. 34 ›› Issue (2): 23401-023401.doi: 10.1088/1674-1056/ad990f

Characterization of nonlinear spectral linewidth and light shift in diffuse laser-cooled atoms

Yiran Yin(殷怡然), An-Ning Xu(许安宁), Jin Peng(彭瑾), and Bei Liu(刘贝)†

Key Laboratory of Laser and Infrared System, Ministry of Education, Center for Optics Research and Engineering (CORE), Shandong University, Qingdao 266237, China

收稿日期:2024-09-12 修回日期:2024-11-14 接受日期:2024-12-02 出版日期:2025-02-15 发布日期:2025-01-15
通讯作者: Bei Liu E-mail:beiliu@sdu.edu.cn
基金资助:
Project supported by Shandong Provincial Natural Science Foundation (Grant No. ZR2023LLZ003), the National Natural Science Foundation of China (Grant No. 62005145), Fundamental Research Fund of Shandong University, and Shandong Provincial Postdoctoral Science Foundation (Grant No. SDBX202302002).

Characterization of nonlinear spectral linewidth and light shift in diffuse laser-cooled atoms

Yiran Yin(殷怡然), An-Ning Xu(许安宁), Jin Peng(彭瑾), and Bei Liu(刘贝)†

Key Laboratory of Laser and Infrared System, Ministry of Education, Center for Optics Research and Engineering (CORE), Shandong University, Qingdao 266237, China

Received:2024-09-12 Revised:2024-11-14 Accepted:2024-12-02 Online:2025-02-15 Published:2025-01-15
Contact: Bei Liu E-mail:beiliu@sdu.edu.cn
Supported by:
Project supported by Shandong Provincial Natural Science Foundation (Grant No. ZR2023LLZ003), the National Natural Science Foundation of China (Grant No. 62005145), Fundamental Research Fund of Shandong University, and Shandong Provincial Postdoctoral Science Foundation (Grant No. SDBX202302002).

摘要/Abstract

摘要： We demonstrate an integrating sphere to cool $^{87}\rm Rb$ atoms and measure the recoil-induced resonance and electromagnetically induced absorption spectrum. We measure the relationship between their linewidth and light shift with variation of the detuning and power of the cooling laser and study the performance of the diffuse laser cooling mechanism by the absorption linewidth radio $\Delta\nu_{\rm E}/\Delta\nu_{\rm R}$ and light shift $\lvert{\varDelta_{\rm R}-\varDelta_{\rm E}}\rvert$ using nonlinear spectroscopy. Specifically, when $\Delta\nu_{\rm E}/\Delta\nu_{\rm R}$ reaches a value of 1.57, the temperature and number of cold atoms achieve the optimal cooling effect. This characterization of absorption linewidth and light shift will provide a method to estimate whether diffuse light cooling achieves the best cooling effect, contributing to the future development of isotropic laser cooling for application in quantum sensing.

关键词: nonlinear spectrum, diffuse laser cooling, temperature measurement

Abstract: We demonstrate an integrating sphere to cool $^{87}\rm Rb$ atoms and measure the recoil-induced resonance and electromagnetically induced absorption spectrum. We measure the relationship between their linewidth and light shift with variation of the detuning and power of the cooling laser and study the performance of the diffuse laser cooling mechanism by the absorption linewidth radio $\Delta\nu_{\rm E}/\Delta\nu_{\rm R}$ and light shift $\lvert{\varDelta_{\rm R}-\varDelta_{\rm E}}\rvert$ using nonlinear spectroscopy. Specifically, when $\Delta\nu_{\rm E}/\Delta\nu_{\rm R}$ reaches a value of 1.57, the temperature and number of cold atoms achieve the optimal cooling effect. This characterization of absorption linewidth and light shift will provide a method to estimate whether diffuse light cooling achieves the best cooling effect, contributing to the future development of isotropic laser cooling for application in quantum sensing.

Key words: nonlinear spectrum, diffuse laser cooling, temperature measurement

中图分类号: (Interactions of atoms and molecules with surfaces)

34.35.+a

37.10.De (Atom cooling methods) 47.80.Cb (Velocity measurements) 82.53.Kp (Coherent spectroscopy of atoms and molecules)

Yiran Yin(殷怡然), An-Ning Xu(许安宁), Jin Peng(彭瑾), and Bei Liu(刘贝). Characterization of nonlinear spectral linewidth and light shift in diffuse laser-cooled atoms[J]. 中国物理B, 2025, 34(2): 23401-023401.

Yiran Yin(殷怡然), An-Ning Xu(许安宁), Jin Peng(彭瑾), and Bei Liu(刘贝). Characterization of nonlinear spectral linewidth and light shift in diffuse laser-cooled atoms[J]. Chin. Phys. B, 2025, 34(2): 23401-023401.

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Characterization of nonlinear spectral linewidth and light shift in diffuse laser-cooled atoms

Characterization of nonlinear spectral linewidth and light shift in diffuse laser-cooled atoms

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