Paraxial skyrmionic beams

被引：109
作者：
Gao, Sijia [1 ]
Speirits, Fiona C. [1 ]
Castellucci, Francesco [1 ]
Franke-Arnold, Sonja [1 ]
Barnett, Stephen M. [1 ]
Gotte, Jorg B. [1 ,2 ]
机构：
[1] Univ Glasgow, Sch Phys & Astron, Glasgow G12 8QQ, Lanark, Scotland
[2] Nanjing Univ, Coll Engn & Appl Sci, Nanjing 210093, Peoples R China
来源：
PHYSICAL REVIEW A | 2020年 / 102卷 / 05期
基金：
英国工程与自然科学研究理事会; 欧盟地平线“2020”;
关键词：
ORBITAL ANGULAR-MOMENTUM; VECTOR BEAMS; POLARIZATION; VORTICES;
D O I：
10.1103/PhysRevA.102.053513
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We show that a class of vector vortex beams possesses a topological property that derives both from the spatially varying amplitude of the field and its varying polarization. This property arises as a consequence of the inherent skyrmionic nature of such beams and is quantified by the associated skyrmion number. We illustrate this idea for some of the simplest vector beams and discuss the physical significance of the skyrmion number in this context.
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页数：6
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