Behavior of an optical vortex immediately behind a spherical lens illuminated by circularly polarized light

IF 3.1 3区物理与天体物理 Q2 Engineering

Optik Pub Date : 2025-08-10 DOI:10.1016/j.ijleo.2025.172505

V.V. Kotlyar , A.A. Kovalev , S.S. Stafeev , A.M. Telegin

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Abstract

In this paper we show that when focusing light with right circular polarization, an optical vortex with a topological charge equals to two is formed immediately behind a spherical lens for two transverse projections of the electric field and an optical vortex with a topological charge of unity for the longitudinal projection of the electric vector. This is proven by the fact that when illuminating a lens with an optical vortex with a topological charge of – 2 and right-hand circularly polarization, a ring-shaped intensity distribution is formed at the focus and a local intensity maximum occurs on the optical axis. This intensity maximum on the optical axis is the result of mutual compensation of the optical vortex with a topological charge of – 2 incident on the lens with the optical vortex with a topological charge of 2 formed after the spherical lens. Optical vortices with charges 2 and – 2 formed at the focus of light with linear polarization are responsible for the elliptical shape of the focal spot elongated along the direction of linear polarization.

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圆偏振光照射球面透镜后的光学旋涡的特性

在本文中，我们证明了当光以右圆偏振聚焦时，电场的两个横向投影的球透镜后面立即形成拓扑电荷为2的光学涡流，电矢量的纵向投影的光学涡流具有拓扑电荷为1的光学涡流。用拓扑电荷为- 2且右圆偏振的光涡旋照射透镜时，在焦点处形成环状强度分布，在光轴处出现局部强度最大值。光轴上的强度最大值是入射到透镜上的拓扑电荷为- 2的光涡旋与球面透镜后形成的拓扑电荷为2的光涡旋相互补偿的结果。在线偏振光的焦点处形成带电荷2和- 2的光涡旋，导致焦点光斑沿线偏振方向呈椭圆形拉长。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Optik 物理-光学

CiteScore

6.90

自引率

12.90%

发文量

1471

审稿时长

46 days

期刊介绍： Optik publishes articles on all subjects related to light and electron optics and offers a survey on the state of research and technical development within the following fields: Optics: -Optics design, geometrical and beam optics, wave optics- Optical and micro-optical components, diffractive optics, devices and systems- Photoelectric and optoelectronic devices- Optical properties of materials, nonlinear optics, wave propagation and transmission in homogeneous and inhomogeneous materials- Information optics, image formation and processing, holographic techniques, microscopes and spectrometer techniques, and image analysis- Optical testing and measuring techniques- Optical communication and computing- Physiological optics- As well as other related topics.