National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [11547017, 11547018]; Natural Science Foundation of Hubei ProvinceNatural Science Foundation of Hubei Province [2014CFB578]; Hubei Key Laboratory of Quality Control of Characteristic of Fruits and Vegetables, Hubei Engineering University [2016K01]
机构署名：
本校为其他机构
院系归属：
物理与电子工程学院
摘要：
In this work, we propose a method for generating double-ring-shaped cylindrical vector beams by modulating Pancharatnam-Berry phase (PBP). The theoretical analysis shows that the output field can be expressed as the coherent superposition of two circularly polarized Laguerre-Gaussian components with opposite polarization handness and opposite helical index when a linearly polarized fundamental Gaussian beam inputs the metasurface designed based on PBP. Such a superposition of Laguerre-Gaussian modes forms a double ring-shaped cylindrical vector beam. Additionally, the local polarization orient...
