Topological transition in coated wire medium

TL;DR

This paper presents a theoretical framework for nonlocal homogenization of coated wire metamaterials, showing how dielectric contrast manipulation induces a topological transition from elliptic to hyperbolic dispersion, confirmed by numerical simulations.

Contribution

The paper introduces a new theory of nonlocal homogenization for coated wire metamaterials and demonstrates topological transition control via dielectric contrast.

Findings

Manipulation of dielectric contrast switches dispersion regime.

Theoretical predictions confirmed by numerical simulations.

Topological transition from elliptic to hyperbolic dispersion.

Abstract

We develop a theory of nonlocal homogenization for metamaterial consisting of parallel metallic wires with dielectric coating. It is demonstrated that manipulation of dielectric contrast between wire dielectric shell and host material results in switching of metamaterial dispersion regime from elliptic to the hyperbolic one, i.e. the topological transition takes place. We confirm our theoretical predictions by full-wave numerical simulations.