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arXiv · 2307.09275

Optical Tellegen metamaterial with spontaneous magnetization

S. S. Jazi·I. Faniayeu·R. Cichelero·D. C. Tzarouchis·M. M. Asgari·A. Dmitriev·S. Fan·V. Asadchy
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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.

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S. S. Jazi, I. Faniayeu, R. Cichelero, D. C. Tzarouchis, M. M. Asgari, A. Dmitriev, S. Fan, V. Asadchy. 2023-07-18. Optical Tellegen metamaterial with spontaneous magnetization. https://doi.org/10.1038/s41467-024-45225-y

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