Antiferromagnetic order in hybrid electromagnetic metamaterials

Yuri Kivshar,Andrey E Miroshnichenko,Boris Lukyanchuk,Dmitry Filonov

doi:10.1088/1367-2630/aa6a33

Abstract

We demonstrate experimentally a new type of order in optical magnetism resembling the staggered structure of spins in antiferromagnetic ordered materials. We study hybrid electromagnetic metasurfaces created by assembling hybrid meta-atoms formed by metallic split-ring resonators and dielectric particles with a high refractive index, both supporting optically-induced magnetic dipole resonances of different origin. Each pair (or ‘metamolecule’) is characterized by two interacting magnetic dipole moments with the distance-dependent magnetization resembling the spin exchange interaction in magnetic materials. By directly mapping the structure of the electromagnetic fields, we demonstrate experimentally that strong coupling between the optically-induced magnetic moments of different origin can flip the magnetisation orientation in a metamolecule creating an antiferromagnetic lattice of staggered optically-induced magnetic moments in hybrid metasurfaces.

Highlights

Any further distribution of We demonstrate experimentally a new type of order in optical magnetism resembling the staggered this work must maintain structure of spins in antiferromagnetic ordered materials
We study hybrid electromagnetic attribution to the author(s) and the title of metasurfaces created by assembling hybrid meta-atoms formed by metallic split-ring resonators and the work, journal citation and DOI
By directly mapping the structure of the electromagnetic fields, we demonstrate experimentally that strong coupling between the optically-induced magnetic moments of different origin can flip the magnetisation orientation in a metamolecule creating an antiferromagnetic lattice of staggered optically-induced magnetic moments in hybrid metasurfaces

Summary

Introduction

Any further distribution of We demonstrate experimentally a new type of order in optical magnetism resembling the staggered this work must maintain structure of spins in antiferromagnetic ordered materials. Dielectric particles with a high refractive index, both supporting optically-induced magnetic dipole resonances of different origin.

Results

Conclusion