Quadrupole topological photonic crystals

Most higher order topological phases are realized by emulations of tight binding models. Extending these concepts to continuum theories requires the identification of invariants describing the bulk multipole order. Here the authors realize the analog of quadrupole order for a gyromagnetic photonic c...

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Autores principales: Li He, Zachariah Addison, Eugene J. Mele, Bo Zhen
Formato: article
Lenguaje:EN
Publicado: Nature Portfolio 2020
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Acceso en línea:https://doaj.org/article/71fff96789e54733839f793e9a48531f
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