基于分数涡旋光束的偏振奇点传输特性研究
Study of propagation characteristics of polarization singularities based on fractional vortex beams
叶东 1李俊瑶 1李宗辰 1张颐1
作者信息
- 1. 江苏警官学院刑事科学技术系,南京 210031,中国
- 折叠
摘要
为了研究基于分数涡旋光束的偏振奇点在自由空间的动态传输特性,采用数值模拟的方法,进行了理论分析和数据仿真,得到基于分数圆艾里涡旋光束的偏振奇点在自由空间传输时拓扑结构的演变.结果表明,无论在初始平面内是否含有圆偏振奇点,基于分数圆艾里涡旋光束的偏振奇点的自聚焦特性都会在传播过程中影响光场的拓扑结构,使得光场在传输之初并不包含圆偏振奇异点,但是在经过其自聚焦距离传输之后,光场中将会出现若干个圆偏振奇点;与基于整数圆艾里涡旋光束的偏振奇点相比,两者均具有奇异拓扑结构的自恢复特性,而基于分数的涡旋光束会给恢复后的光场中带来更多的圆偏振奇点.该工作将加深对偏振奇点传输特性的理解,为其应用提供理论基础,并拓宽圆艾里光束的应用范围.
Abstract
In order to study the propagation characteristics of the polarization singularity based on the fractional vortex beam in free space,the method of numerical simulation was adopted,the theoretical analysis and data simulation were carried out,and the evolution of topology of polarization singularity based on the fractional circular Airy vortex beam was obtained during propagation in free space.The results show that regardless of whether there is a circular polarization singularity in the initial plane,the self-focusing properties of the polarization singularity based on the fractional circular Airy vortex beam will affect the topology of the light field during the propagation process,making the light field doesn't contain circular polarization singularities at the beginning of transmission,but after traveling through its self-focusing distance,several circular polarization singularities will appear in the light field.Compared with polarization singularities based on integer circular Airy vortex beams,both have singular topology self-recovery properties,while fractional-based vortex beams will bring more circular polarization singularities into the recovered light field point.This work will deepen the understanding of the propagation characteristics of polarization singularities,provide a theoretical basis for its application,and broaden the application range of circular Airy beams.
关键词
物理光学/传输特性/数值模拟/偏振奇点Key words
physical optics/propagation characteristics/numerical simulation/polarization singularity引用本文复制引用
基金项目
公安部科技计划(2022YY28)
公安部科技计划(2022JC16)
公安技术江苏省重点学科建设项目(十四五)()
公安部物证鉴定中心基本科研专项(2022JB024)
江苏警官学院高层次引进人才科研启动基金(JSP119GKZL404)
江苏警官学院法庭科学先进材料开发应用科研创新团队基金(2021BK01)
出版年
2024
国家科技期刊平台
NSTL
万方数据