Anomalous and Chern topological waves in hyperbolic networks
Abstract Hyperbolic lattices are a new type of synthetic materials based on regular tessellations in non-Euclidean spaces with constant negative curvature. While so far, there has been several theoretical investigations of hyperbolic topological media, experimental work has been limited to time-reve...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2024-03-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-024-46551-x |
| _version_ | 1827315890225414144 |
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| author | Qiaolu Chen Zhe Zhang Haoye Qin Aleksi Bossart Yihao Yang Hongsheng Chen Romain Fleury |
| author_facet | Qiaolu Chen Zhe Zhang Haoye Qin Aleksi Bossart Yihao Yang Hongsheng Chen Romain Fleury |
| author_sort | Qiaolu Chen |
| collection | DOAJ |
| description | Abstract Hyperbolic lattices are a new type of synthetic materials based on regular tessellations in non-Euclidean spaces with constant negative curvature. While so far, there has been several theoretical investigations of hyperbolic topological media, experimental work has been limited to time-reversal invariant systems made of coupled discrete resonances, leaving the more interesting case of robust, unidirectional edge wave transport completely unobserved. Here, we report a non-reciprocal hyperbolic network that exhibits both Chern and anomalous chiral edge modes, and implement it on a planar microwave platform. We experimentally evidence the unidirectional character of the topological edge modes by direct field mapping. We demonstrate the topological origin of these hyperbolic chiral edge modes by an explicit topological invariant measurement, performed from external probes. Our work extends the reach of topological wave physics by allowing for backscattering-immune transport in materials with synthetic non-Euclidean behavior. |
| first_indexed | 2024-04-24T23:04:29Z |
| format | Article |
| id | doaj.art-1c6712e561694ce98c22a6b04d7f6ad2 |
| institution | Directory Open Access Journal |
| issn | 2041-1723 |
| language | English |
| last_indexed | 2024-04-24T23:04:29Z |
| publishDate | 2024-03-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj.art-1c6712e561694ce98c22a6b04d7f6ad22024-03-17T12:32:19ZengNature PortfolioNature Communications2041-17232024-03-011511710.1038/s41467-024-46551-xAnomalous and Chern topological waves in hyperbolic networksQiaolu Chen0Zhe Zhang1Haoye Qin2Aleksi Bossart3Yihao Yang4Hongsheng Chen5Romain Fleury6Laboratory of Wave Engineering, School of Electrical Engineering, EPFLLaboratory of Wave Engineering, School of Electrical Engineering, EPFLLaboratory of Wave Engineering, School of Electrical Engineering, EPFLLaboratory of Wave Engineering, School of Electrical Engineering, EPFLInterdisciplinary Center for Quantum Information, State Key Laboratory of Modern Optical Instrumentation, ZJU-Hangzhou Global Science and Technology Innovation Center, College of Information Science and Electronic Engineering, ZJU-UIUC Institute, Zhejiang UniversityInterdisciplinary Center for Quantum Information, State Key Laboratory of Modern Optical Instrumentation, ZJU-Hangzhou Global Science and Technology Innovation Center, College of Information Science and Electronic Engineering, ZJU-UIUC Institute, Zhejiang UniversityLaboratory of Wave Engineering, School of Electrical Engineering, EPFLAbstract Hyperbolic lattices are a new type of synthetic materials based on regular tessellations in non-Euclidean spaces with constant negative curvature. While so far, there has been several theoretical investigations of hyperbolic topological media, experimental work has been limited to time-reversal invariant systems made of coupled discrete resonances, leaving the more interesting case of robust, unidirectional edge wave transport completely unobserved. Here, we report a non-reciprocal hyperbolic network that exhibits both Chern and anomalous chiral edge modes, and implement it on a planar microwave platform. We experimentally evidence the unidirectional character of the topological edge modes by direct field mapping. We demonstrate the topological origin of these hyperbolic chiral edge modes by an explicit topological invariant measurement, performed from external probes. Our work extends the reach of topological wave physics by allowing for backscattering-immune transport in materials with synthetic non-Euclidean behavior.https://doi.org/10.1038/s41467-024-46551-x |
| spellingShingle | Qiaolu Chen Zhe Zhang Haoye Qin Aleksi Bossart Yihao Yang Hongsheng Chen Romain Fleury Anomalous and Chern topological waves in hyperbolic networks Nature Communications |
| title | Anomalous and Chern topological waves in hyperbolic networks |
| title_full | Anomalous and Chern topological waves in hyperbolic networks |
| title_fullStr | Anomalous and Chern topological waves in hyperbolic networks |
| title_full_unstemmed | Anomalous and Chern topological waves in hyperbolic networks |
| title_short | Anomalous and Chern topological waves in hyperbolic networks |
| title_sort | anomalous and chern topological waves in hyperbolic networks |
| url | https://doi.org/10.1038/s41467-024-46551-x |
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