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dc.contributor.authorYang, B
dc.contributor.authorGuo, Q
dc.contributor.authorTremain, B
dc.contributor.authorBarr, LE
dc.contributor.authorGao, W
dc.contributor.authorLiu, H
dc.contributor.authorBéri, B
dc.contributor.authorXiang, Y
dc.contributor.authorFan, D
dc.contributor.authorHibbins, AP
dc.contributor.authorZhang, S
dc.date.accessioned2017-07-26T13:40:49Z
dc.date.issued2017-07-21
dc.description.abstractThe discovery of topological phases has introduced new perspectives and platforms for various interesting physics originally investigated in quantum contexts and then, on an equal footing, in classic wave systems. As a characteristic feature, nontrivial Fermi arcs, connecting between topologically distinct Fermi surfaces, play vital roles in the classification of Dirac and Weyl semimetals, and have been observed in quantum materials very recently. However, in classical systems, no direct experimental observation of Fermi arcs in momentum space has been reported so far. Here, using near-field scanning measurements, we show the observation of photonic topological surface-state arcs connecting topologically distinct bulk states in a chiral hyperbolic metamaterial. To verify the topological nature of this system, we further observe backscattering-immune propagation of a nontrivial surface wave across a three-dimension physical step. Our results demonstrate a metamaterial approach towards topological photonics and offer a deeper understanding of topological phases in three-dimensional classical systems.en_GB
dc.description.sponsorshipThis work was financially supported by ERC Consolidator Grant (Topological), the Royal Society and the Wolfson Foundation. B.Y. acknowledges China Scholarship Council (201306110041). S.Z. and B.B. acknowledge support from the Royal Society. Y.X. and D.F. acknowledge support from the National Natural Science Foundation of China (Grant Nos. 61490713 and 61505111). Q.G. acknowledges support from the National Natural Science Foundation of China (Grant No. 11604216). L.E.B., B.T. and A.P.H. acknowledge financial support from the Engineering and Physical Sciences Research Council (EPSRC) of the United Kingdom, via the EPSRC Centre for Doctoral Training in Metamaterials (Grant No. EP/L015331/1).en_GB
dc.identifier.citationVol. 8, article 97en_GB
dc.identifier.doi10.1038/s41467-017-00134-1
dc.identifier.urihttp://hdl.handle.net/10871/28649
dc.language.isoenen_GB
dc.publisherSpringer Natureen_GB
dc.relation.urlhttp://hdl.handle.net/10871/28162en_GB
dc.rights© The Author(s) 2017. Open Access. This 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 license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit http://creativecommons.org/licenses/by/4.0/.en_GB
dc.subjectMetamaterialsen_GB
dc.subjectMicrowave photonicsen_GB
dc.subjectSub-wavelength opticsen_GB
dc.titleDirect observation of topological surface-state arcs in photonic metamaterials (article)en_GB
dc.typeArticleen_GB
dc.date.available2017-07-26T13:40:49Z
dc.descriptionThis is the final version of the article. Available from Springer Nature via the DOI in this record.en_GB
dc.descriptionThe dataset associated with this article is in ORE at http://hdl.handle.net/10871/28162en_GB
dc.identifier.journalNature Communicationsen_GB
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/


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© The Author(s) 2017. Open Access. This 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 license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit http://creativecommons.org/licenses/by/4.0/.
Except where otherwise noted, this item's licence is described as © The Author(s) 2017. Open Access. This 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 license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit http://creativecommons.org/licenses/by/4.0/.