Synthetic Axion Response with Space-Time Crystals

Prudêncio, Filipa R.; Silveirinha, Mário G.

doi:10.1103/physrevapplied.19.024031

Cited by 21 publications

(3 citation statements)

References 47 publications

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“…Furthermore, inside such three-dimensional metamaterials, the bulk isotropic Tellegen effect necessarily vanishes when uniform external magnetic bias field is used. Recently, two alternative ideas were conceptualized suggesting the bulk ME effect using temporally modulated permittivity and permeability at optical frequencies 18 and a multilayer metamaterial in the out-of-plane antiferromagnetic configuration 19 . However, the practical realization of both material types is highly complex, let alone in the optical regime most probably unfeasible with the current state of nanotechnology.…”

Section: Introductionmentioning

confidence: 99%

Optical Tellegen metamaterial with spontaneous magnetization

Safaei Jazi,

Faniayeu,

Cichelero

et al. 2024

Nat Commun

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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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Section: Introductionmentioning

confidence: 99%

Optical Tellegen metamaterial with spontaneous magnetization

Safaei Jazi,

Faniayeu,

Cichelero

et al. 2024

Nat Commun

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“…Time-varying material responses create new opportunities for light technologies [1][2][3][4][5][6][7]. Time modulated materials potentially offer an unprecedented control of the electromagnetic radiation, as they enable nonreciprocal waveguiding and strongly nonreciprocal light-matter interactions, without an external magnetic bias.…”

mentioning

confidence: 99%

“…Interestingly, the velocity that determines the synthetic Fresnel drag is different from the modulation velocity v, both in amplitude and sign. Furthermore, recently we introduced an analytical formalism to homogenize spacetime crystals made of anisotropic crystals [6]. It was demonstrated that anisotropic spacetime crystals with a suitable glide-rotation symmetry behave effectively as Tellegen (axion) media [7][8][9].…”

mentioning

confidence: 99%