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Article Comment on “Absence of Topological Protection of the Interface States in Z 2 Photonic Crystals”

Xing-Xiang Wang ORCID ; Toshikaze Kariyado SAMURAI ORCID ; Xiao Hu SAMURAI ORCID

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Xing-Xiang Wang, Toshikaze Kariyado, Xiao Hu. Comment on “Absence of Topological Protection of the Interface States in Z 2 Photonic Crystals”. Physical Review Letters. 2025, 134 (9), 099301. https://doi.org/10.1103/physrevlett.134.099301

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(abstract)

In the previous Letter, Xu et al. reported that edge modes disappear in the expanded structure of the Wu-Hu model characterized by Z2 topological index, while they appear in the trivial shrunken structure, when the edge cuts through the hexagonal unit cell. They then concluded that these edge modes are defect modes lacking topological protection. Unfortunately, their approach is not justified, rendering the conclusion unsolid.

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Keyword: topological photonic crystal

Date published: 2025-03-04

Publisher: American Physical Society (APS)

Journal:

  • Physical Review Letters (ISSN: 00319007) vol. 134 issue. 9 099301

Funding:

  • JST JPMJCR18T4 (CREST)

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5512

First published URL: https://doi.org/10.1103/physrevlett.134.099301

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Updated at: 2025-06-03 12:30:12 +0900

Published on MDR: 2025-06-03 12:21:30 +0900

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