Optical Tellegen metamaterial with spontaneous magnetization
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Nature Communications, Volume 15, issue 1
Abstract
The nonreciprocal magnetoelectric effect, also known as the Tellegen effect, promises a number of groundbreaking phenomena connected to fundamental (e.g., electrodynamics of axion and relativistic matter) and applied physics (e.g., magnetless isolators). We propose a three-dimensional metamaterial with an isotropic and resonant Tellegen response in the visible frequency range. The metamaterial is formed by randomly oriented bi-material nanocylinders in a host medium. Each nanocylinder consists of a ferromagnet in a single-domain magnetic state and a high-permittivity dielectric operating near the magnetic Mie-type resonance. The proposed metamaterial requires no external magnetic bias and operates on the spontaneous magnetization of the nanocylinders. By leveraging the emerging magnetic Weyl semimetals, we further show how a giant bulk effective magnetoelectric effect can be achieved in a proposed metamaterial, exceeding that of natural materials by almost four orders of magnitude.Description
Publisher Copyright: © The Author(s) 2024.
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Safaei Jazi, S, Faniayeu, I, Cichelero, R, Tzarouchis, D C, Asgari, M M, Dmitriev, A, Fan, S & Asadchy, V 2024, 'Optical Tellegen metamaterial with spontaneous magnetization', Nature Communications, vol. 15, no. 1, 1293. https://doi.org/10.1038/s41467-024-45225-y