Tuning Optical Orbital Angular Momentum in Optical Superlattice under Electro-optic Effect

TL;DR

This paper presents a novel method to generate and tune optical orbital angular momentum in a focused Gaussian beam passing through an optical superlattice influenced by the electro-optic effect, enabling dynamic control of light's angular momentum.

Contribution

It introduces a new approach to control optical OAM using electro-optic effects in superlattices, with adjustable parameters for enhanced manipulation.

Findings

Adjusting electric field, beam waist, and crystal length significantly alters OAM.

The method allows continuous tuning of OAM across the beam's transverse section.

Potential applications in optical manipulation are identified.

Abstract

We introduce a new method to generate and tune the optical orbital angular momentum of a focused Gaussian beam passing through the optical superlattice under the electro-optic effect. The orbital angular momentum (OAM) arises from the curl of polarization in our calculation. We see that adjusting the external electric field, the beam waist radius and the crystal length provides dramatic variation of OAM of light across the transverse section. It is believed that this invention will find its application in optical manipulation area.