Formation of optical vortices with all-glass nanostructured gradient index masks

Opt Express. 2017 Dec 11;25(25):31443-31450. doi: 10.1364/OE.25.031443.

Abstract

We report the development of microscopic size gradient index vortex masks using the modified stack-and-draw technique. The vortex mask has a form of flat surface all-glass plate. Its functionality is determined by an internal nanostructure composed of two types of soft glass nanorods. The generation of optical vortices with charges 1 and 2 is demonstrated.