Subwavelength multiple topological interface states in one-dimensional labyrinthine acoustic metamaterials

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Show simple item record Zhang, Zhiwang Cheng, Ying Liu, Xiaojun Christensen, Johan 2020-12-15T10:35:15Z 2020-12-15T10:35:15Z 2019-06-01
dc.identifier.bibliographicCitation Physical Review B, (2019), 99(22), 224104, [9] p.
dc.identifier.issn 1098-0121
dc.description.abstract Acoustic analogies of topological insulators reside at the frontier of ongoing metamaterials research. Of particular interest are the topological interface states that are determined by the Zak phase, which is the geometric phase characterizing the topological property of the bands in one-dimensional systems. Here we design double-channel Mie resonators based on the so-called labyrinth acoustic metamaterials, which can be considered equivalent to a ultraslow medium of large refractive index, inevitably containing structural features on a subwavelength scale. The metamolecule containing two cells is engineered to host the degenerated states through a zone-folding mechanism, whereupon the Zak phase transition takes place when the interval between two cells changes from shrunk to expanded. Furthermore, the topological interface state displays strong robustness against randomly introduced perturbations whose acoustic intensity is enhanced by nearly a factor1600 in comparison to an ordinary waveguide.
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). Z.Z. acknowledges the support from the China Scholarship Council. J.C. acknowledges the support from the European Research Council (ERC) through the Starting Grant No. 714577 PHONOMETA and from the MINECO through a Ramón y Cajal grant (Grant No. RYC-2015-17156).
dc.format.extent 9
dc.language.iso eng
dc.publisher American Physical Society
dc.rights ©2019 American Physical Society.
dc.subject.other Acoustic metamaterials
dc.subject.other Acoustic wave phenomena
dc.subject.other Topological insulators
dc.subject.other Bloch-Floquet theorem
dc.title Subwavelength multiple topological interface states in one-dimensional labyrinthine acoustic metamaterials
dc.type article
dc.description.status Publicado
dc.subject.eciencia Física
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.publicationissue 22, 224104
dc.identifier.publicationlastpage 9
dc.identifier.publicationtitle PHYSICAL REVIEW B
dc.identifier.publicationvolume 99
dc.identifier.uxxi AR/0000025118
dc.contributor.funder Ministerio de Economía y Competitividad (España)
dc.contributor.funder European Commission
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