Antiferromagnetic order in hybrid electromagnetic metamaterials

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

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    19 Citations (Scopus)

    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.

    Original languageEnglish
    Article number083013
    JournalNew Journal of Physics
    Volume19
    Issue number8
    DOIs
    Publication statusPublished - 14 Aug 2017

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