An optical vortex having an isolated point singularity is associated with the spatial structure
of light waves. A polarization vortex (vector beam) with a polarization singularity has …

In physics, wave propagation is traditionally analyzed by means of regular solutions of wave
equations. However, solutions of wave equations in two and three dimensions often possess …

Vortex beams have attracted much attention in recent years due to unique features of the
phase or polarization singularity in the center part of beams. Various applications have been …

Optical vortices carrying orbital angular momentum (OAM) have attracted increasing interest
in recent years. Optical vortices have seen a variety of emerging applications in optical …

We report an approach to the increase of signal channels in free-space optical
communication based on composed optical vortices (OVs). In the encoding process …

This article reviews recent progress leading to the generation of optical vortex beams. After
introducing the basics of optical vortex beams and their promising applications, we …

Optical vortex beams, possessing spatial polarization or phase singularities, have intriguing
properties such as the ability to yield super-resolved spots under focussing, and the ability to …

Optical vortex is a promising candidate for capacity scaling in next-generation optical
communications. The generation of multi-vortex beams is of great importance for vortex …

Optical vortex beams can be used as carriers of information in optical communication and
quantum optics applications. Owing to their spatial orthogonality, these beams can be …

Mode sorting is an essential function for optical multiplexing systems that exploit the
orthogonality of the orbital angular momentum mode space. The familiar log-polar optical …