Numerical Simulation of the Coupling between Split-Ring Resonators and Antiferromagnetic Magnons

TL;DR

This paper uses FDTD simulations to explore how split-ring resonator metamaterials interact with antiferromagnetic magnons, revealing hybridization effects and coupling strength dependence.

Contribution

It introduces a simulation approach to study the coupling between SRR metamaterials and antiferromagnetic magnons, highlighting mode hybridization and tunable coupling.

Findings

Hybridization of SRR and magnon modes observed

Coupling strength depends on spacer thickness

Avoided crossing indicates strong mode interaction

Abstract

We report on the results of simulations of the terahertz response of a split ring resonator (SRR) metamaterial coupled to a hypothetical antiferromagnetic material characterized by a magnon resonance. The simulations were done using finite difference time domain (FDTD) techniques. By adjusting the magnon frequency we find a hybridization of the resonant normal modes of the SRR and the magnon manifested as an avoided crossing. By varying the physical separation between the metamaterial and the antiferromagnet with a dielectric spacer, we evaluated the coupling strength between the two.