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Title: Antiferromagnetic order in hybrid electromagnetic metamaterials
Authors: Miroshnichenko, Andrey E
Filonov, Dmitry
Lukyanchuk, Boris
Kivshar, Yuri
Keywords: Metasurfaces
Optically-induced Magnetic Resonance
Issue Date: 2017
Source: Miroshnichenko, A. E., Filonov, D., Lukyanchuk, B., & Kivshar, Y. (2017). Antiferromagnetic order in hybrid electromagnetic metamaterials. New Journal of Physics, 19(8), 083013-.
Series/Report no.: New Journal of Physics
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.
ISSN: 1367-2630
DOI: 10.1088/1367-2630/aa6a33
Rights: © 2017 IOP Publishing Ltd and Deutsche Physikalische Gesellschaft. Original content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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