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Proceedings Paper

A comparative study of the spin-orbit interactions in Pancharatnam-Berry phase elements and in normal incidence of a light beam at a sharp interface
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Paper Abstract

Spin-controlled vortex generation is a manifestation of the spin-orbit interaction (SOI) of light, which has been extensively studied in Pancharatnam-Berry geometric phase elements in recent years. The SOI under the normal incidence of a light beam at a sharp interface, also shown by a spin-dependent vortex, has attracted little attention, except for a few exceptions. Here, we establish a Fresnel Jones matrix to fully describe the dynamics of beam reflection and refraction at sharp interfaces under normal incidence. It is pointed out that the vortex phase originates from the topological structure of the beam itself and is essentially a spin-redirection Berry phase. Although the geometric phase in Pancharatnam-Berry elements comes from the anisotropy of the external material, which shows a fundamental difference, they are the same in form. We then give a comparative study of the two kinds of SOI, and reveal the intrinsic connection and difference between them. Our research not only establishes a unified framework to describe the two SOIs, but also offers a new perspective for studying the SOIs in other physics.

Paper Details

Date Published: 18 November 2019
PDF: 6 pages
Proc. SPIE 11193, Nanophotonics and Micro/Nano Optics V, 1119316 (18 November 2019); doi: 10.1117/12.2537255
Show Author Affiliations
Huiling Luo, Hengyang Normal Univ. (China)
Hunan Normal Univ. (China)
Xiaohui Ling, Hengyang Normal Univ. (China)
Hunan Normal Univ. (China)
Xinxing Zhou, Hunan Normal Univ. (China)

Published in SPIE Proceedings Vol. 11193:
Nanophotonics and Micro/Nano Optics V
Zhiping Zhou; Kazumi Wada; Limin Tong, Editor(s)

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