Local resonator stimulated polarization transition in metamaterials and the formation of topological interface states

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dc.contributor.author Hu, Guobiao
dc.contributor.author Lan, Chunbo
dc.contributor.author Tang, Lihua
dc.contributor.author Yang, Yaowen
dc.date.accessioned 2021-10-05T04:02:47Z
dc.date.available 2021-10-05T04:02:47Z
dc.date.issued 2022-2-15
dc.identifier.issn 0888-3270
dc.identifier.uri https://hdl.handle.net/2292/56759
dc.description.abstract Developing the acoustic-elastic analogy of a topological insulator has attracted extensive research attention in recent years. Designs developed in the literature strongly rely on reforming the host structure of a system to achieve topology transition. In this article, an innovative topological metamaterial is presented. Unlike topological phononic crystals, the proposed topological metamaterial has a uniform host structure without any phononic crystal features. The band inversion and polarization transition are achieved by manipulating the design of local resonators. It has been proven that by changing the coupling spring constant of local resonators, the mode topologies at the bound states associated with the band gaps can be converted. Three polarization transition points have been found from the bound evolution analysis, and all of them possess the capability of stimulating topological interface states in the corresponding band gaps. The Zak phase calculations have further ascertained the prediction about the topological interface states. The band structure and transmittance spectrum of a supercell lattice of the proposed topological metamaterial have been examined. The topological interface states, as well as the energy localization effects, have been successfully observed in all the three band gaps. The proposed metamaterial brings the convenience of creating topological interface states by carefully manipulating the local resonators only. The methodology presented in this work is thus of practical significance in transforming existing structures into topological systems without revising them.
dc.publisher Elsevier
dc.relation.ispartofseries Mechanical Systems and Signal Processing
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher.
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm
dc.subject 0905 Civil Engineering
dc.subject 0913 Mechanical Engineering
dc.subject 0915 Interdisciplinary Engineering
dc.title Local resonator stimulated polarization transition in metamaterials and the formation of topological interface states
dc.type Journal Article
dc.identifier.doi 10.1016/j.ymssp.2021.108388
pubs.begin-page 108388
pubs.volume 165
dc.date.updated 2021-09-01T00:35:59Z
dc.rights.holder Copyright: The author en
pubs.author-url https://www.sciencedirect.com/science/article/pii/S088832702100741X
pubs.end-page 108388
dc.rights.accessrights http://purl.org/eprint/accessRights/RetrictedAccess en
pubs.subtype Article
pubs.elements-id 865025
pubs.online-publication-date 2021-9-1

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