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Physics > Optics
Title: Breakdown effect of periodic perturbations to the robustness of topological phase in a gyromagnetic photonic crystal
(Submitted on 9 Mar 2023 (v1), last revised 26 Sep 2023 (this version, v3))
Abstract: In the known field of topological photonics, what remains less so is the breakdown effect of topological phases deteriorated by perturbation. In this paper, we investigate the variance on topological invariants for a periodic Kekul{\'e} medium perturbed in unit cells, which was a gyromagnetic photonic crystal holding topological phases induced by \emph{synchronized rotation} of unit cells. Two parameters for geometric and material perturbation are respectively benchmarked to characterise the topological degradation. Our calculation demonstrates that such a periodic perturbation easily destructs the topological phase, and thus calls for further checkups on robustness under such unit-cell-perturbation in realization.
Submission history
From: Yangjié Liu [view email][v1] Thu, 9 Mar 2023 01:00:54 GMT (17112kb,D)
[v2] Mon, 29 May 2023 06:51:02 GMT (18907kb,D)
[v3] Tue, 26 Sep 2023 00:10:31 GMT (18906kb,D)
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