Spin and orbital angular momentum and their conversion in cylindrical vector vortices

Zhu, Jiangbo, Chen, Yujie, Zhang, Yanfeng, Cai, Xinlun and Yu, Siyuan (2014) Spin and orbital angular momentum and their conversion in cylindrical vector vortices. Optics Letters, 39 (15). p. 4435. ISSN 0146-9592

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Official URL: https://doi.org/10.1364/OL.39.004435

Abstract

The generation of light beams carrying orbital angular momentum (OAM) has been greatly advanced with the emergence of the recently reported integrated optical vortex emitters. Generally, optical vortices emitted by these devices possess cylindrically symmetric states of polarization and spiral phase fronts, and they can be defined as cylindrical vector vortices (CVVs). Using the radiation of angularly arranged dipoles to model the CVVs, these beams as hybrid modes of two circularly polarized scalar vortices are theoretically demonstrated to own well-defined total angular momentum. Moreover, the effect of spin-orbit interactions of angular momentum is identified in the CVVs when the size of the emitting structure varies. This effect results in the diminishing spin component of angular momentum and purer OAM states at large structure radii.

Item Type: Article
Subjects: F300 Physics
F900 Others in Physical Sciences
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Rachel Branson
Date Deposited: 01 Jun 2020 13:10
Last Modified: 01 Jun 2020 13:15
URI: http://nrl.northumbria.ac.uk/id/eprint/43287

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