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Optically-Induced Symmetry Switching in a Reconfigurable Kagome Photonic Lattice: From Flatband to Type-III Dirac Cones
We demonstrate the transition of band structure from flatband to type-III Dirac cones in an electromagnetically induced Kagome photonic lattice generated in a three-level Λ-type (85)Rb atomic configuration both experimentally and theoretically. Such instantaneously reconfigurable Kagome photonic lat...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9504076/ https://www.ncbi.nlm.nih.gov/pubmed/36145009 http://dx.doi.org/10.3390/nano12183222 |
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author | Yu, Qingsong Liu, Zhenzhi Guo, Dawei Liang, Shun Zhang, Yanpeng Zhang, Zhaoyang |
author_facet | Yu, Qingsong Liu, Zhenzhi Guo, Dawei Liang, Shun Zhang, Yanpeng Zhang, Zhaoyang |
author_sort | Yu, Qingsong |
collection | PubMed |
description | We demonstrate the transition of band structure from flatband to type-III Dirac cones in an electromagnetically induced Kagome photonic lattice generated in a three-level Λ-type (85)Rb atomic configuration both experimentally and theoretically. Such instantaneously reconfigurable Kagome photonic lattice with flatband is “written” by a strong coupling field possessing a Kagome intensity distribution, which can modulate the refractive index of atomic vapors in a spatially periodical manner under electromagnetically induced transparency. By introducing an additional one-dimensional periodic coupling field to cover any one set of the three inequivalent sublattices of the induced Kagome photonic lattice, the dispersion-less energy band can evolve into type-III Dirac cones with linear dispersion by easily manipulating the intensity of the one-dimensional field. Our results may pave a new route to engineer in situ reconfigurable photonic structures with type-III Dirac cones, which can act as promising platforms to explore the underlying physics and beam dynamics. |
format | Online Article Text |
id | pubmed-9504076 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-95040762022-09-24 Optically-Induced Symmetry Switching in a Reconfigurable Kagome Photonic Lattice: From Flatband to Type-III Dirac Cones Yu, Qingsong Liu, Zhenzhi Guo, Dawei Liang, Shun Zhang, Yanpeng Zhang, Zhaoyang Nanomaterials (Basel) Article We demonstrate the transition of band structure from flatband to type-III Dirac cones in an electromagnetically induced Kagome photonic lattice generated in a three-level Λ-type (85)Rb atomic configuration both experimentally and theoretically. Such instantaneously reconfigurable Kagome photonic lattice with flatband is “written” by a strong coupling field possessing a Kagome intensity distribution, which can modulate the refractive index of atomic vapors in a spatially periodical manner under electromagnetically induced transparency. By introducing an additional one-dimensional periodic coupling field to cover any one set of the three inequivalent sublattices of the induced Kagome photonic lattice, the dispersion-less energy band can evolve into type-III Dirac cones with linear dispersion by easily manipulating the intensity of the one-dimensional field. Our results may pave a new route to engineer in situ reconfigurable photonic structures with type-III Dirac cones, which can act as promising platforms to explore the underlying physics and beam dynamics. MDPI 2022-09-16 /pmc/articles/PMC9504076/ /pubmed/36145009 http://dx.doi.org/10.3390/nano12183222 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Yu, Qingsong Liu, Zhenzhi Guo, Dawei Liang, Shun Zhang, Yanpeng Zhang, Zhaoyang Optically-Induced Symmetry Switching in a Reconfigurable Kagome Photonic Lattice: From Flatband to Type-III Dirac Cones |
title | Optically-Induced Symmetry Switching in a Reconfigurable Kagome Photonic Lattice: From Flatband to Type-III Dirac Cones |
title_full | Optically-Induced Symmetry Switching in a Reconfigurable Kagome Photonic Lattice: From Flatband to Type-III Dirac Cones |
title_fullStr | Optically-Induced Symmetry Switching in a Reconfigurable Kagome Photonic Lattice: From Flatband to Type-III Dirac Cones |
title_full_unstemmed | Optically-Induced Symmetry Switching in a Reconfigurable Kagome Photonic Lattice: From Flatband to Type-III Dirac Cones |
title_short | Optically-Induced Symmetry Switching in a Reconfigurable Kagome Photonic Lattice: From Flatband to Type-III Dirac Cones |
title_sort | optically-induced symmetry switching in a reconfigurable kagome photonic lattice: from flatband to type-iii dirac cones |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9504076/ https://www.ncbi.nlm.nih.gov/pubmed/36145009 http://dx.doi.org/10.3390/nano12183222 |
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