National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [11547017]; Hubei Engineering University Research Foundation, China [z2014001]; Natural Science Foundation of Hubei Province, ChinaNatural Science Foundation of Hubei Province [2014CFB578]
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：
We propose a method for generating double-ring-shaped vector beams. A step phase introduced by a spatial light modulator (SLM) first makes the incident laser beam have a nodal cycle. This phase is dynamic in nature because it depends on the optical length. Then a Pancharatnam-Berry phase (PBP) optical element is used to manipulate the local polarization of the optical field by modulating the geometric phase. The experimental results show that this scheme can effectively create double-ring-shaped vector beams. It provides much greater flexibilit...
