聚焦场自旋-轨道角动量相互作用的研究进展

doi:10.3969/j.issn.1007-5461.2022.01.005

摘要/Abstract

摘要： 光同时具有自旋和轨道角动量属性, 它们分别与光的偏振和相位分布相关。在傍轴条件下, 光的自旋和轨道角动量在自由空间传输过程中是相互独立且各自守恒的。而在非傍轴条件下, 如紧聚焦或者散射光场中, 光的自旋与轨道角动量之间会发生相互耦合和转化。其中, 紧聚焦场中自旋与轨道角动量的相互作用由于广泛涉及光学捕获、显微和探测等应用领域, 近年来受到广泛关注。综述了紧聚焦场中自旋、轨道角动量理论计算方法, 自旋-轨道角动量相互作用与入射结构光场的关系以及最新的相关应用研究进展。

关键词: 傅里叶光学, 紧聚焦, 自旋角动量, 轨道角动量, 自旋- 轨道角动量相互作用, 光捕获

Abstract: Light can carry both spin and orbital angular momenta, which are determined by light’s polarization and spatial degrees of freedom respectively. In paraxial fields, optical spin and orbital angular momenta are mutually independent and conserved under free-space propagation. By contrast, in nonparaxial fields, such as tightly focused or scattered fields, the coupling and transformation between the spin and orbital angular momenta occur. Particularly, because it is widely involved in applications such as optical trapping, microscopy and sensing, spin-orbit interactions (SOIs) occurring in tight focusing systems have gained much attention recently. This review presents the theoretical calculation of spin and orbital angular momenta in the tightly focused fields, reveals the relationship between SOIs and the incident structured light fields, and briefly introduces the latest progress of the related applications.

Key words: Fourier optics, tight focusing, spin angular momentum, orbital angular momentum, spinorbital angular momentum interaction, optical trapping

中图分类号:

O431.1

吴一京, 余盼盼, 刘易凡, 王自强, 李银妹, 龚雷, ∗. 聚焦场自旋-轨道角动量相互作用的研究进展[J]. 量子电子学报, 2022, 39(1): 81-95.

WU Yijing , YU Panpan , LIU Yifan , WANG Ziqiang , LI Yinmei , , GONG Lei , ∗. Review of spin-orbit angular momentum interaction in tightly focused fields[J]. Chinese Journal of Quantum Electronics, 2022, 39(1): 81-95.

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