Emergent axion response in multilayered metamaterials

TL;DR

This paper designs multilayered metamaterials that emulate axion electrodynamics, deriving an effective medium theory and validating key predictions through numerical simulations.

Contribution

It introduces an analytical effective medium description for magneto-optical multilayers exhibiting tunable axion responses, advancing metamaterial design.

Findings

Effective axion response achieved with tunable parameters

Analytical model validated numerically

Design principles for axion-like metamaterials

Abstract

We consider the design of metamaterials whose behavior embodies the equations of axion electrodynamics. We derive an effective medium description of an assembly of magneto-optical layers with out-of-plane magnetization analytically and show how to achieve effective axion response with tunable parameters. We display some key predictions and validate them numerically.