基于Metasurface的柱矢量光束的产生  

Generation of cylindrical vector beams based on metasurface

作　　者：易煦农[1,2] 李瑛[1,3] 刘亚超[3] 凌晓辉[1] 张志友[1] 罗海陆[1,3] 

机构地区：[1]深圳大学光电工程学院,深圳518060 [2]湖北工程学院物理与电子信息工程学院,孝感432000 [3]湖南大学微纳光电器件及应用教育部重点实验室,长沙410082

出　　处：《物理学报》2014年第9期142-147,共6页Acta Physica Sinica

基　　金：教育部博士点基金(批准号:20100542917);湖北省教育厅科学研究项目(批准号:Q20132703)资助的课题~~

摘　　要：本文提出了一种基于Metasurface产生任意柱矢量光束的方法.采用的Metasurface是在熔融石英上刻蚀空间变化的非周期光栅构成.非周期光栅会形成空变的有效双折射,从而对光场的偏振态空间分布进行调制.通过琼斯矩阵的方法分析得出这样的Metasurface可以将入射线偏振光转换为柱矢量光束,并且只需要改变入射线偏振光的偏振方向即可获得高阶庞加莱球赤道上任意一点的柱矢量光束.最后,用Metasurface搭建了一套简单、高效的柱矢量光束产生系统,实验结果与理论分析一致.A method of generating cylindrical vector beams based on metasurface is presented in this paper. The metasurface is a fused silica with a space-variant non-periodic grating which is written by laser. The non-periodic grating induces a space-variant effective birefringence that modulates the space distribution of polarization state. It is shown that an incident linearly polarized light can be converted to a cylindrical vector beam by the method of Jones matrix. We can obtain an arbitrary cylindrical vector beam on the equator of the higher-order Poincar＆#233; sphere. A simple and efficient experimental system is established with a metasurface. Experimental results are in agreement with the theoretical analysis.

关 键 词：柱矢量光束 高阶庞加莱球 激光光学 

分 类 号：O436[机械工程—光学工程]