Document Type

Article

Publication Date

9-5-2016

Publication Title

Optics Express

ISSN

1094-4087

Volume

24

Issue

18

First Page

21177

Last Page

21189

DOI

https://doi-org.colorado.idm.oclc.org/10.1364/OE.24.021177

PubMed ID

27607720

Abstract

A propagation model of vector beams generated by metasurfaces based on vector diffraction theory is established theoretically and verified experimentally. Considering the Pancharatnam-Berry phase introduced by the metasurface, analytical forms of vector beams for arbitrary incident polarization and topological charge of metasurfaces are found in the Fresnel and Fraunhofer diffraction regions, respectively. The complex amplitude of the resultant vector beam can be described in terms of a confluent hypergeometric function, with an intensity profile that manifests concentric rings in the Fresnel region and a single ring in the Fraunhofer one. Fraunhofer diffraction provides a method to create vector beams with simultaneously high purity and modal power. Further experiments verify the theoretical results.

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