Subwavelength acoustic valley-hall topological insulators using soda cans honeycomb lattices

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dc.contributor.author Zhang, Zhiwang
dc.contributor.author Gu, Ye
dc.contributor.author Long, Houyou
dc.contributor.author Cheng, Ying
dc.contributor.author Liu, Xiaojun
dc.contributor.author Christensen, Johan
dc.date.accessioned 2020-12-15T09:43:28Z
dc.date.available 2020-12-15T09:43:28Z
dc.date.issued 2019-08-08
dc.identifier.bibliographicCitation AAAS Research, Volume, (2019), Article ID 5385763, pp.: [8].
dc.identifier.issn 2096-5168
dc.identifier.uri http://hdl.handle.net/10016/31596
dc.description.abstract Topological valley-contrasting physics has attracted great attention in exploring the use of the valley degree of freedom as apromising carrier of information. Recently, this concept has been extended to acoustic systems to obtain nonbackscattering soundpropagations. However, previous demonstrations are limited by the cut-of frequency of 2D waveguides and lattice-scale sizerestrictions since the topological edge states originate from Bragg interference. Here we engineer topologically valley-projected edgestates in the form of spoof surface acoustic waves that confne along the surface of a subwavelength honeycomb lattice composedof 330-mL soda cans. Te inversion symmetry is broken through injecting a certain amount of water into one of the two cansin each unit cell, which gaps the Dirac cone and ultimately leads to the topological valley-Hall phase transition. Dual-frequencyranges of the valley-projected edge states below the sound line are observed, which originate from the frst-order and second-orderresonances, respectively. Tese results have the potential to enable promising routes to design integrated acoustic devices based onvalley-contrasting physics.
dc.description.sponsorship This work was supported by National Key R&D Program of China (2017YFA0303702), NSFC (11834008, 11874215, 11674172, and 11574148), Jiangsu Provincial NSF (BK20160018), the Fundamental Research Funds for the Central Universities (020414380001), and Nanjing University Innovation and Creative Program for PhD candidate (CXCY17-11). Zhiwang Zhang acknowledges the support from the China Scholarship Council. Johan Christensen acknowledges the support from the European Research Council (ERC) through the Starting Grant 714577 PHONOMETA and from the MINECO through a Ramón y Cajal grant (Grant no. RYC-2015-17156).
dc.format.extent 8
dc.language.iso eng
dc.publisher American Association for the Advancement of Science
dc.rights Copyright © 2019 Zhiwang Zhang et al. Exclusive licensee Science and Technology Review Publishing House. Distributed under a Creative Commons Attribution License (CC BY 4.0).
dc.rights Atribución-NoComercial-SinDerivadas 3.0 España
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subject.other Valleytronics
dc.subject.other Topological insulators
dc.subject.other Honeycomb lattice
dc.title Subwavelength acoustic valley-hall topological insulators using soda cans honeycomb lattices
dc.type article
dc.description.status Publicado
dc.subject.eciencia Física
dc.identifier.doi https://doi.org/10.34133/2019/5385763
dc.rights.accessRights openAccess
dc.relation.projectID info:eu-repo/grantAgreement/EC/H2020/714577/PHONOMETA
dc.relation.projectID Gobierno de España. RYC-2015-17156
dc.type.version publishedVersion
dc.identifier.publicationfirstpage 1
dc.identifier.publicationlastpage 8
dc.identifier.publicationtitle Research: a science parner journal
dc.identifier.publicationvolume 2019, 5385763
dc.identifier.uxxi AR/0000026450
dc.contributor.funder Ministerio de Economía y Competitividad (España)
dc.contributor.funder European Commission
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