@article{Devescovi:2024:10.1038/s41467-024-50766-3,
author = {Devescovi, C and Morales-Pérez, A and Hwang, Y and García-Díez, M and Robredo, I and Luis, Mañes J and Bradlyn, B and García-Etxarri, A and Vergniory, MG},
doi = {10.1038/s41467-024-50766-3},
journal = {Nat Commun},
title = {Axion topology in photonic crystal domain walls.},
url = {http://dx.doi.org/10.1038/s41467-024-50766-3},
volume = {15},
year = {2024}
}

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TY  - JOUR
AB  - Axion insulators are 3D magnetic topological insulators supporting hinge states and quantized magnetoelectric effects, recently proposed for detecting dark-matter axionic particles via their axionic excitations. Beyond theoretical interest, obtaining a photonic counterpart of axion insulators offers potential for advancing magnetically-tunable photonic devices and axion haloscopes based on axion-photon conversion. This work proposes an axionic 3D phase within a photonic setup. By building inversion-symmetric domain-walls in gyrotropic photonic crystals, we bind chiral modes on inversion-related hinges, ultimately leading to the realization of an axionic channel of light. These states propagate embedded in a 3D structure, thus protected from radiation in the continuum. Employing a small external gyromagnetic bias, we transition across different axionic mode configurations, enabling effective topological switching of chiral photonic fibers. While demonstrating the possibility of realizing axion photonic crystals within state-of-the-art gyrotropic setups, we propose a general scheme for rendering axion topology at domain walls of Weyl semimetals.
AU  - Devescovi,C
AU  - Morales-Pérez,A
AU  - Hwang,Y
AU  - García-Díez,M
AU  - Robredo,I
AU  - Luis,Mañes J
AU  - Bradlyn,B
AU  - García-Etxarri,A
AU  - Vergniory,MG
DO  - 10.1038/s41467-024-50766-3
PY  - 2024///
TI  - Axion topology in photonic crystal domain walls.
T2  - Nat Commun
UR  - http://dx.doi.org/10.1038/s41467-024-50766-3
UR  - https://www.ncbi.nlm.nih.gov/pubmed/39122685
VL  - 15
ER  - 

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