Canonical momentum, angular momentum, and helicity of circularly polarized Airy beams

被引：4

作者：

Hui, Yuanfei ^{[1
]}

Cui, Zhiwei ^{[1
]}

Song, Pan ^{[1
]}

Han, Yiping ^{[1
]}

Zhao, Wenjuan ^{[1
]}

机构：

[1] Xidian Univ, Sch Phys & Optoelect Engn, Xian 710071, Peoples R China

来源：

PHYSICS LETTERS A | 2020年 / 384卷 / 14期

基金：

中国国家自然科学基金;

关键词：

Airy beams; Momentum; Spin angular momentum; Orbital angular momentum; Helicity; VECTOR; MICROPARTICLES; CONTROVERSY; LIGHT;

D O I：

10.1016/j.physleta.2020.126284

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report a study of the momentum, angular momentum, and helicity of circularly polarized Airy beams propagating in free space. By using the vector angular spectrum representation, the explicit analytical expressions for the electric and magnetic field components of circularly polarized Airy beams are derived in detail. To overcome the drawbacks of classical kinematics formulae when applied to structured light beams, a general canonical approach is introduced to describe the momentum, angular momentum and helicity of Airy beams. Numerical simulation results for the spatial distributions of the canonical momentum, spin and orbital angular momentum, as well as the helicity densities are presented and discussed. This study may provide useful insights into the dynamical properties of Airy beams that may be important in several applications, including the optical control, micromanipulation, and information processing. (C) 2020 Elsevier B.V. All rights reserved.

引用

页数：8

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