中国物理B ›› 2025, Vol. 34 ›› Issue (8): 84202-084202.doi: 10.1088/1674-1056/add4f7

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Quasi-two-dimensional isotropic laser cooling of atoms for quantum sensing

Xiao Zhang(张孝)1,2,†,‡, Yi Song(宋屹)1,2,†, Yuan Sun(孙远)1,2, and Liang Liu(刘亮)1,2,§   

  1. 1 CAS Key Laboratory of Quantum Optics and Aerospace Laser Technology and Systems Department, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences (CAS), Shanghai 201800, China;
    2 University of Chinese Academy of Sciences, Beijing 100049, China
  • 收稿日期:2025-02-19 修回日期:2025-04-30 接受日期:2025-05-07 出版日期:2025-07-17 发布日期:2025-08-12
  • 通讯作者: Xiao Zhang, Liang Liu E-mail:zhangxiao@siom.ac.cn;liang.liu@siom.ac.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 92165107), the China Postdoctoral Science Foundation (Grant No. 2022M723270), and the National Defense Basic Scientific Research Pogram of China.

Quasi-two-dimensional isotropic laser cooling of atoms for quantum sensing

Xiao Zhang(张孝)1,2,†,‡, Yi Song(宋屹)1,2,†, Yuan Sun(孙远)1,2, and Liang Liu(刘亮)1,2,§   

  1. 1 CAS Key Laboratory of Quantum Optics and Aerospace Laser Technology and Systems Department, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences (CAS), Shanghai 201800, China;
    2 University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2025-02-19 Revised:2025-04-30 Accepted:2025-05-07 Online:2025-07-17 Published:2025-08-12
  • Contact: Xiao Zhang, Liang Liu E-mail:zhangxiao@siom.ac.cn;liang.liu@siom.ac.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 92165107), the China Postdoctoral Science Foundation (Grant No. 2022M723270), and the National Defense Basic Scientific Research Pogram of China.

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摘要： Isotropic laser cooling (ILC) is widely recognized for its distinct advantages and demonstrates significant potential in quantum precision measurements and quantum sensing technologies. The morphology and density distribution of the cold atomic cloud generated by ILC are strongly influenced by the distribution of cooling light and the structural geometry of the cavity, making precise characterization and optimization of cold atom distribution essential for practical applications. In this paper, we present an innovative flat diffuse cavity design with the dimensions approximating a quasi-two-dimensional configuration, which generates a sheet-like isotropic laser field inside the cavity through diffuse reflections. We thoroughly characterized the system's performance under different optical parameter settings. A two-dimensional (2D) movable detection system was employed to detect the quasi-two-dimensional distribution of cold atoms. These results demonstrate the ability of ILC to produce diverse morphological and density distributions of cold atoms, which we anticipate will be suitable for quantum sensing.

关键词: quasi-two-dimensional, isotropic laser cooling, quantum sensing

Abstract: Isotropic laser cooling (ILC) is widely recognized for its distinct advantages and demonstrates significant potential in quantum precision measurements and quantum sensing technologies. The morphology and density distribution of the cold atomic cloud generated by ILC are strongly influenced by the distribution of cooling light and the structural geometry of the cavity, making precise characterization and optimization of cold atom distribution essential for practical applications. In this paper, we present an innovative flat diffuse cavity design with the dimensions approximating a quasi-two-dimensional configuration, which generates a sheet-like isotropic laser field inside the cavity through diffuse reflections. We thoroughly characterized the system's performance under different optical parameter settings. A two-dimensional (2D) movable detection system was employed to detect the quasi-two-dimensional distribution of cold atoms. These results demonstrate the ability of ILC to produce diverse morphological and density distributions of cold atoms, which we anticipate will be suitable for quantum sensing.

Key words: quasi-two-dimensional, isotropic laser cooling, quantum sensing

中图分类号:  (Quantum optics)

  • 42.50.-p
37.10.De (Atom cooling methods) 37.10.Mn (Slowing and cooling of molecules) 32.90.+a (Other topics in atomic properties and interactions of atoms with photons)