Breakdown effect of periodic perturbations to the robustness of topological phase in a gyromagnetic photonic crystal
Abstract In the known field of topological photonics, what remains less so is the breakdown effect of topological phases deteriorated by perturbation. In this study, the authors investigate the variance on topological invariants for a periodic Kekulé medium perturbed in unit cells, which was a gyrom...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2023-12-01
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| Series: | IET Optoelectronics |
| Subjects: | |
| Online Access: | https://doi.org/10.1049/ote2.12106 |
| _version_ | 1797388006035816448 |
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| author | Y. Tian Rui Zhou Zheng‐Rong Liu Y. Liu Hai Lin Bin Zhou |
| author_facet | Y. Tian Rui Zhou Zheng‐Rong Liu Y. Liu Hai Lin Bin Zhou |
| author_sort | Y. Tian |
| collection | DOAJ |
| description | Abstract In the known field of topological photonics, what remains less so is the breakdown effect of topological phases deteriorated by perturbation. In this study, the authors investigate the variance on topological invariants for a periodic Kekulé medium perturbed in unit cells, which was a gyromagnetic photonic crystal holding topological phases induced by synchronised 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 realisation. |
| first_indexed | 2024-03-08T22:33:28Z |
| format | Article |
| id | doaj.art-87fed08564954b1888175301227b824d |
| institution | Directory Open Access Journal |
| issn | 1751-8768 1751-8776 |
| language | English |
| last_indexed | 2024-03-08T22:33:28Z |
| publishDate | 2023-12-01 |
| publisher | Wiley |
| record_format | Article |
| series | IET Optoelectronics |
| spelling | doaj.art-87fed08564954b1888175301227b824d2023-12-17T14:54:14ZengWileyIET Optoelectronics1751-87681751-87762023-12-0117624925610.1049/ote2.12106Breakdown effect of periodic perturbations to the robustness of topological phase in a gyromagnetic photonic crystalY. Tian0Rui Zhou1Zheng‐Rong Liu2Y. Liu3Hai Lin4Bin Zhou5School of Physics Hubei University Wuhan Hubei Province ChinaCollege of Physics Science and Technology Central China Normal University Wuhan Hubei Province ChinaSchool of Physics Hubei University Wuhan Hubei Province ChinaSchool of Physics Hubei University Wuhan Hubei Province ChinaCollege of Physics Science and Technology Central China Normal University Wuhan Hubei Province ChinaSchool of Physics Hubei University Wuhan Hubei Province ChinaAbstract In the known field of topological photonics, what remains less so is the breakdown effect of topological phases deteriorated by perturbation. In this study, the authors investigate the variance on topological invariants for a periodic Kekulé medium perturbed in unit cells, which was a gyromagnetic photonic crystal holding topological phases induced by synchronised 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 realisation.https://doi.org/10.1049/ote2.12106photonic crystalstopological insulators |
| spellingShingle | Y. Tian Rui Zhou Zheng‐Rong Liu Y. Liu Hai Lin Bin Zhou Breakdown effect of periodic perturbations to the robustness of topological phase in a gyromagnetic photonic crystal IET Optoelectronics photonic crystals topological insulators |
| title | Breakdown effect of periodic perturbations to the robustness of topological phase in a gyromagnetic photonic crystal |
| title_full | Breakdown effect of periodic perturbations to the robustness of topological phase in a gyromagnetic photonic crystal |
| title_fullStr | Breakdown effect of periodic perturbations to the robustness of topological phase in a gyromagnetic photonic crystal |
| title_full_unstemmed | Breakdown effect of periodic perturbations to the robustness of topological phase in a gyromagnetic photonic crystal |
| title_short | Breakdown effect of periodic perturbations to the robustness of topological phase in a gyromagnetic photonic crystal |
| title_sort | breakdown effect of periodic perturbations to the robustness of topological phase in a gyromagnetic photonic crystal |
| topic | photonic crystals topological insulators |
| url | https://doi.org/10.1049/ote2.12106 |
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