柱矢量涡旋光束在自由空间中传输时角动量的全矢量特性  

Full vector properties of angular momentum of cylindrical vector vortex beam propagating in free space

作　　者：高雨洁 李晋红[1] 王静 刘晋宏 尹晓金 GAO Yujie;LI Jinhong;WANG Jing;LIU Jinhong;YIN Xiaojin(Shanxi Center of Technology Innovation for Light Manipulations and Applications,School of Applied Science,Taiyuan University of Science and Technology,Taiyuan 030024,China;Department of Science,Taiyuan Institute of Technology,Taiyuan 030008,China)

机构地区：[1]太原科技大学应用科学学院,山西省光场调控与融合应用技术创新中心,太原030024 [2]太原工业学院理学系,太原030008

出　　处：《物理学报》2025年第5期283-291,共9页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:62305238,12104332);山西省基础研究计划(批准号:202203021211192)资助的课题.

摘　　要：利用自旋-动量关系表征了柱矢量涡旋光束在自由空间中传输时的动量(P)、自旋角动量(SAM)、横向自旋角动量(t-SAM)、纵向自旋角动量(l-SAM)、轨道角动量以及矢量光场分布.研究结果表明:P存在与光轴平行和垂直的分量,t-SAM,l-SAM和光场在拓扑荷m不为零时均存在与光轴平行和垂直的分量,而SAM只存在与光轴垂直的分量,不存在与光轴平行的分量.使用自旋-动量关系,对在自由空间中传输的柱矢量涡旋光束的光学参量进行全矢量的表征,可以为分析结构光束在不同介质中传输时的角动量特性提供一定的理论基础.The full vector properties of the optical parameters of cylindrical vector vortex beam(CVVB)propagating in free space,such as the momentum(P),spin angular momentum(SAM),transverse-type spin angular momentum(t-SAM),longitudinal-type spin angular momentum(l-SAM),and light field are characterized by using spin-momentum relation in this work.The research results show that P has x-,y-,and z-component,SAM has x-and y-components,but no z-component;t-SAM and l-SAM both have components which are parallel and perpendicular to the optical axis when the topological charge m is not 0;t-SAM has a longitudinal component which is related to the helical trajectory of photons;l-SAM has a transverse component in free space.Except for the angularly polarized vortex beam(APVB),which has no longitudinal field when the topological charge m is 0,both radially polarized vortex beam(RPVB)and APVB have longitudinal fields in free space.The vectorial characteristic of the angular momentum of CVVB in free space can provide a theoretical basis for analyzing the transmission of structured beams in different media.

关 键 词：柱矢量涡旋光束 动量 自旋角动量 轨道角动量 

分 类 号：O43[机械工程—光学工程]