Topological charge of a Gaussian beam with an off-axis optical vortex

IF 2.2 3区物理与天体物理 Q2 OPTICS

Optics Communications Pub Date : 2024-10-17 DOI:10.1016/j.optcom.2024.131220

Vitaly P. Panov , Doyeon Lee , V.V. Kotlyar , A.A. Kovalev , P.A.N.S. Priyadharshana , Keumcheol Kwak , L.K. Migara , Jang-Kun Song

引用次数: 0

Abstract

We show that when an optical vortex with a topological charge n shifts from the optical axis of a Gaussian beam, the orbital angular momentum decreases, whereas the topological charge remains unchanged. We experimentally confirmed this phenomenon with the aid of a q-plate array generated in a liquid crystal cell filled with a frustrated chiral nematic. We also theoretically proved that the topological charge of an optical vortex is conserved when the optical vortex is displaced from the axis.

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带有离轴光学漩涡的高斯光束的拓扑电荷

我们的研究表明，当拓扑电荷为 n 的光涡旋偏离高斯光束的光轴时，轨道角动量会减小，而拓扑电荷保持不变。我们借助在充满受挫手性向列的液晶池中生成的 q 板阵列，在实验中证实了这一现象。我们还从理论上证明，当光学漩涡偏离轴线时，其拓扑电荷是守恒的。

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

Optics Communications 物理-光学

CiteScore

5.10

自引率

8.30%

发文量

681

审稿时长

38 days

期刊介绍： Optics Communications invites original and timely contributions containing new results in various fields of optics and photonics. The journal considers theoretical and experimental research in areas ranging from the fundamental properties of light to technological applications. Topics covered include classical and quantum optics, optical physics and light-matter interactions, lasers, imaging, guided-wave optics and optical information processing. Manuscripts should offer clear evidence of novelty and significance. Papers concentrating on mathematical and computational issues, with limited connection to optics, are not suitable for publication in the Journal. Similarly, small technical advances, or papers concerned only with engineering applications or issues of materials science fall outside the journal scope.