Cargando…
Topological phase transition and robust pseudospin interface states induced by angular perturbation in 2D topological photonic crystals
In recent years the research about topological photonic structures has been a very attractive topic in nanoscience from both a basic science and a technological point of view. In this work we propose a two-dimensional topological photonic structure, composed of a trivial and a topological photonic c...
Autores principales: | , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2023
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9842764/ https://www.ncbi.nlm.nih.gov/pubmed/36646749 http://dx.doi.org/10.1038/s41598-023-27868-x |
_version_ | 1784870217665478656 |
---|---|
author | Borges-Silva, Daniel Costa, Carlos H. Bezerra, Claudionor G. |
author_facet | Borges-Silva, Daniel Costa, Carlos H. Bezerra, Claudionor G. |
author_sort | Borges-Silva, Daniel |
collection | PubMed |
description | In recent years the research about topological photonic structures has been a very attractive topic in nanoscience from both a basic science and a technological point of view. In this work we propose a two-dimensional topological photonic structure, composed of a trivial and a topological photonic crystals, made of dumbbell-shaped dielectric rods. The topological behavior is induced by introducing an angular perturbation in the dumbbell-shaped dielectric rods. We show that this composed structure supports pseudospin interface states at the interface between the trivial and topological crystals. Our numerical results show that a bandgap is opened in the band structure by introducing the angular perturbation in the system, lifting the double degeneracy of the double Dirac cone at the [Formula: see text] point of the Brillouin zone, despite keeping the [Formula: see text] symmetry group. A pseudospin topological behavior was observed and analyzed with emphasis on the photonic bands at the [Formula: see text] point. We have also investigated the robustness of these pseudospin interface states and, according with our numerical results, we conclude that they are robust against defects, disorder and reflection. Finally, we have shown that the two edge modes present energy flux propagating in opposite directions, which is the photonic analogue of the quantum spin Hall effect. |
format | Online Article Text |
id | pubmed-9842764 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-98427642023-01-18 Topological phase transition and robust pseudospin interface states induced by angular perturbation in 2D topological photonic crystals Borges-Silva, Daniel Costa, Carlos H. Bezerra, Claudionor G. Sci Rep Article In recent years the research about topological photonic structures has been a very attractive topic in nanoscience from both a basic science and a technological point of view. In this work we propose a two-dimensional topological photonic structure, composed of a trivial and a topological photonic crystals, made of dumbbell-shaped dielectric rods. The topological behavior is induced by introducing an angular perturbation in the dumbbell-shaped dielectric rods. We show that this composed structure supports pseudospin interface states at the interface between the trivial and topological crystals. Our numerical results show that a bandgap is opened in the band structure by introducing the angular perturbation in the system, lifting the double degeneracy of the double Dirac cone at the [Formula: see text] point of the Brillouin zone, despite keeping the [Formula: see text] symmetry group. A pseudospin topological behavior was observed and analyzed with emphasis on the photonic bands at the [Formula: see text] point. We have also investigated the robustness of these pseudospin interface states and, according with our numerical results, we conclude that they are robust against defects, disorder and reflection. Finally, we have shown that the two edge modes present energy flux propagating in opposite directions, which is the photonic analogue of the quantum spin Hall effect. Nature Publishing Group UK 2023-01-16 /pmc/articles/PMC9842764/ /pubmed/36646749 http://dx.doi.org/10.1038/s41598-023-27868-x Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Borges-Silva, Daniel Costa, Carlos H. Bezerra, Claudionor G. Topological phase transition and robust pseudospin interface states induced by angular perturbation in 2D topological photonic crystals |
title | Topological phase transition and robust pseudospin interface states induced by angular perturbation in 2D topological photonic crystals |
title_full | Topological phase transition and robust pseudospin interface states induced by angular perturbation in 2D topological photonic crystals |
title_fullStr | Topological phase transition and robust pseudospin interface states induced by angular perturbation in 2D topological photonic crystals |
title_full_unstemmed | Topological phase transition and robust pseudospin interface states induced by angular perturbation in 2D topological photonic crystals |
title_short | Topological phase transition and robust pseudospin interface states induced by angular perturbation in 2D topological photonic crystals |
title_sort | topological phase transition and robust pseudospin interface states induced by angular perturbation in 2d topological photonic crystals |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9842764/ https://www.ncbi.nlm.nih.gov/pubmed/36646749 http://dx.doi.org/10.1038/s41598-023-27868-x |
work_keys_str_mv | AT borgessilvadaniel topologicalphasetransitionandrobustpseudospininterfacestatesinducedbyangularperturbationin2dtopologicalphotoniccrystals AT costacarlosh topologicalphasetransitionandrobustpseudospininterfacestatesinducedbyangularperturbationin2dtopologicalphotoniccrystals AT bezerraclaudionorg topologicalphasetransitionandrobustpseudospininterfacestatesinducedbyangularperturbationin2dtopologicalphotoniccrystals |