Abruptly autofocusing property of circular Airy vortex beams with different initial launch angles
Abruptly autofocusing property of circular Airy vortex beams with different initial launch angles
复制标题
不同初始发射角圆形艾里涡旋光束的突变自聚焦特性
DOI：
10.1364/josaa.35.000890
复制
发表时间：
2018-06-01
影响因子：
1.9
通讯作者：
Zhu, Xiuwei
中科院分区：
文献类型：
--
作者：
Jiang, Yunfeng;Zhao, Shuofeng;Zhu, Xiuwei
采用负入射角控制圆艾里光束的轨迹会大大降低其突然自聚焦特性。通过数值模拟圆形艾里涡旋光束在不同初始入射角下的传输，证明了较大的光学涡旋拓扑荷（OV）在不同入射角（特别是负入射角）下都有助于增强光束的突变自聚焦特性，而不影响光束的聚焦位置和轨迹.在不同的发射角度下，两个相对的OV会相互吸引，并在CAB的焦平面上部分重叠，从而产生更强的自动聚焦。随着两个OV之间的距离增加，焦点强度对比度将降低，特别是对于具有正发射角的光束，其自动聚焦特性随着距离的增加而更快地降低。(c)2018美国光学学会
Controlling the trajectory of circular Airy beams (CABs) by negative launch angles would greatly reduce their abruptly autofocusing property. By numerically simulating the propagation of a circular Airy vortex beam with different initial launch angles, we demonstrate in this paper that a larger topological charge of optical vortex (OV) is quite helpful to enhance the abruptly autofocusing property under different launch angles (especially for negative launch angles), without affecting the focal position and trajectory. Two opposite OVs would attract each other and partially overlap in the focal plane of CAB under different launch angles, causing even stronger autofocusing. As the distance between two OVs increases, the focal intensity contrast would decrease, especially for a beam with positive launch angles, whose autofocusing property decreases much more quickly with the distance. (c) 2018 Optical Society of America