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Willis Metamaterial on a Structured Beam

hal.structure.identifierDepartment of Physics [Hong Kong University of Science and Technology]
hal.structure.identifierSchool of Physics and Astronomy [Birmingham]
dc.contributor.authorLIU, Yongquan
dc.contributor.authorLIANG, Zixian
hal.structure.identifierSchool of Physics and Astronomy [Birmingham]
dc.contributor.authorZHU, Jian
hal.structure.identifierSchool of Physics and Astronomy [Birmingham]
hal.structure.identifierPhotonics Initiative, Advanced Science Research Center
dc.contributor.authorXIA, Lingbo
hal.structure.identifierCentre de Recherche Paul Pascal [CRPP]
dc.contributor.authorMONDAIN-MONVAL, Olivier
IDREF: 084112654
hal.structure.identifierInstitut de Mécanique et d'Ingénierie [I2M]
dc.contributor.authorBRUNET, Thomas
hal.structure.identifierPhotonics Initiative, Advanced Science Research Center, City University of New York
dc.contributor.authorALU, Andrea
hal.structure.identifierSchool of Physics and Astronomy
hal.structure.identifierSchool of Physics and Astronomy [Birmingham]
dc.contributor.authorLI, Jensen
dc.date.accessioned2021-05-14T09:34:07Z
dc.date.available2021-05-14T09:34:07Z
dc.date.issued2019-02
dc.identifier.issn2160-3308
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/76104
dc.description.abstractEnBianisotropy is common in electromagnetism whenever a cross-coupling between electric and magnetic responses exists. However, the analogous concept for elastic waves in solids, termed as Willis coupling, is more challenging to observe. It requires coupling between stress and velocity or momentum and strain fields, which is difficult to induce in non-negligible levels, even when using metamaterial structures. Here, we report the experimental realization of a Willis metamaterial for flexural waves. Based on a cantileverbending resonance, we demonstrate asymmetric reflection amplitudes and phases due to Willis coupling. We also show that, by introducing loss in the metamaterial, the asymmetric amplitudes can be controlled and can be used to approach an exceptional point of the non-Hermitian system, at which unidirectional zero reflection occurs. The present work extends conventional propagation theory in plates and beams to includeWillis coupling and provides new avenues to tailor flexural waves using artificial structures.
dc.language.isoen
dc.publisherAmerican Physical Society
dc.subject.enMetamaterials
dc.subject.enAcoustics
dc.title.enWillis Metamaterial on a Structured Beam
dc.typeArticle de revue
dc.identifier.doi10.1103/PhysRevX.9.011040
dc.subject.halPhysique [physics]/Physique [physics]
dc.subject.halPhysique [physics]/Physique [physics]/Optique [physics.optics]
bordeaux.journalPhysical Review X
bordeaux.page1-12
bordeaux.volume9
bordeaux.hal.laboratoriesInstitut de Mécanique et d’Ingénierie de Bordeaux (I2M) - UMR 5295*
bordeaux.issue1
bordeaux.institutionUniversité de Bordeaux
bordeaux.institutionBordeaux INP
bordeaux.institutionCNRS
bordeaux.institutionINRAE
bordeaux.institutionArts et Métiers
bordeaux.peerReviewedoui
hal.identifierhal-02890676
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02890676v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Physical%20Review%20X&rft.date=2019-02&rft.volume=9&rft.issue=1&rft.spage=1-12&rft.epage=1-12&rft.eissn=2160-3308&rft.issn=2160-3308&rft.au=LIU,%20Yongquan&LIANG,%20Zixian&ZHU,%20Jian&XIA,%20Lingbo&MONDAIN-MONVAL,%20Olivier&rft.genre=article


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