Cao Bingsong, Shen Donghui, Qiu Zhifang, Li Tong, Huang Kaikai, Zhang Xian, Lu Xuanhui
J Opt Soc Am A Opt Image Sci Vis. 2020 Dec 1;37(12):1883-1887. doi: 10.1364/JOSAA.405549.
We theoretically and experimentally study the propagation characteristics of elliptical Airy vortex beams (EAVBs) with a circular concentric vortex. It is found that EAVBs inherit the abruptly autofocusing properties of the circular Airy beams (CABs), but EAVBs will have a better autofocusing performance than circular Airy vortex beams (CAVBs) under certain conditions. It is also found that the initial -order concentric vortex of EAVBs splits into || first-order vortices at the autofocusing plane, and the focusing pattern splits into ||+1 bright spots with the pattern's tilting direction related to the sign of [ is the topological charge (TC) of the vortex]. These characteristics of EAVBs may have potential applications in TC detection, optical micromanipulation, communications, and other fields.
我们从理论和实验两方面研究了具有圆形同心涡旋的椭圆艾里涡旋光束（EAVB）的传播特性。研究发现，EAVB继承了圆形艾里光束（CAB）的突然自聚焦特性，但在某些条件下，EAVB的自聚焦性能优于圆形艾里涡旋光束（CAVB）。还发现，EAVB的初始一阶同心涡旋在自聚焦平面分裂为||个一阶涡旋，聚焦图案分裂为|| + 1个亮点，图案的倾斜方向与[为涡旋的拓扑电荷（TC）]的符号有关。EAVB的这些特性可能在TC检测、光学微操纵、通信等领域具有潜在应用。
