Dual and anti-dual modes in dielectric spheres

TL;DR

This paper explores how the angular momentum of light can induce dual or anti-dual electromagnetic behavior in dielectric spheres, despite their non-dual material properties, by selecting appropriate excitation beams.

Contribution

It demonstrates the conditions under which dielectric spheres can exhibit dual or anti-dual behavior through specific light excitation, revealing new control over light-matter interactions.

Findings

Dielectric spheres can behave as dual systems with proper excitation.

Conditions for inducing dual or anti-dual behavior are identified.

The study enhances understanding of light manipulation using dielectric particles.

Abstract

We present how the angular momentum of light can play an important role to induce a dual or anti-dual behaviour on a dielectric particle. Although the material the particle is made of is not dual, i.e. a dielectric does not interact with an electrical field in the same way as it does with a magnetic one, a spherical particle can behave as a dual system when the correct excitation beam is chosen. We study the conditions under which this induced dual or anti-dual behaviour can be induced.