Integrated multi vector vortex beam generator

TL;DR

This paper proposes an integrated ring resonator system capable of generating, manipulating, and sorting vector vortex beams with specific polarization and orbital angular momentum properties, advancing optical communication technologies.

Contribution

It introduces a novel integrated design for generating and sorting vector vortex beams using concentric ring resonators with grating structures.

Findings

Numerical demonstration of complex optical field emission from the resonator.

Ability to generate arbitrary orbital angular momentum qudit states.

Orbital angular momentum sorter with -10 dB cross-talk.

Abstract

A novel method to generate and manipulate vector vortex beams in an integrated, ring resonator based geometry is proposed. We show numerically that a ring resonator, with an appropriate grating, addressed by a vertically displaced access waveguide emits a complex optical field. The emitted beam possesses a specific polarization topology, and consequently a transverse intensity profile and orbital angular momentum. We propose a combination of several concentric ring resonators, addressed with different bus guides, to generate arbitrary orbital angular momentum qudit states, which could potentially be used for classical and quantum communications. Finally, we demonstrate numerically that this device works as an orbital angular momentum sorter with an average cross-talk of -10 dB between different orbital angular momentum channels.