Ultrathin Acoustic Parity-Time Symmetric Metasurface Cloak

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dc.contributor.author Li, Hao-Xiang
dc.contributor.author Rosendo López, María
dc.contributor.author Zhu, Yi-Fan
dc.contributor.author Fan, Xu-Dong
dc.contributor.author Torrent, Daniel
dc.contributor.author Liang, Bin
dc.contributor.author Cheng, Jian-Chun
dc.contributor.author Christensen, Johan
dc.date.accessioned 2020-12-14T16:01:59Z
dc.date.available 2020-12-14T16:01:59Z
dc.date.issued 2019-08-19
dc.identifier.bibliographicCitation Research: a science parner journal, Vol. 2019, Article ID 8345683, Aug. 2019, 7 pp.
dc.identifier.issn 2096-5168
dc.identifier.issn 2639-5274 (online)
dc.identifier.uri http://hdl.handle.net/10016/31594
dc.description.abstract Invisibility or unhearability cloaks have been made possible by using metamaterials enabling light or sound to flow around obstacle without the trace of reflections or shadows. Metamaterials are known for being flexible building units that can mimic a host of unusual and extreme material responses, which are essential when engineering artificial material properties to realize a coordinate transforming cloak. Bending and stretching the coordinate grid in space require stringent material parameters; therefore, small inaccuracies and inevitable material losses become sources for unwanted scattering that are decremental to the desired effect. These obstacles further limit the possibility of achieving a robust concealment of sizeable objects from either radar or sonar detection. By using an elaborate arrangement of gain and lossy acoustic media respecting parity-time symmetry, we built a one-way unhearability cloak able to hide objects seven times larger than the acoustic wavelength. Generally speaking, our approach has no limits in terms of working frequency, shape, or size, specifically though we demonstrate how, in principle, an object of the size of a human can be hidden from audible sound.
dc.description.sponsorship This work was supported by the National Key R&D Program of China (Grant No. 2017YFA0303700), the National Natural Science Foundation of China (Grant No. 11634006) and the Innovation Special Zone of National Defense Science and Technology. Daniel TorrentThis work was supported by the National Key R&D Program of China (Grant No. 2017YFA0303700), the National Natural Science Foundation of China (Grant No. 11634006) and the Innovation Special Zone of National Defense Science and Technology. Daniel Torrent acknowledges the support from the MINECO through a Ramón y Cajal grant (Grant no. RYC-2016-21188). Johan Christensen 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). acknowledges the support from the MINECO through a Ramón y Cajal grant (Grant no. RYC-2016-21188). Johan Christensen 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 7
dc.language.iso eng
dc.publisher American Association for the Advancement of Science (AAAS)
dc.rights Copyright © 2019 Hao-xiang Li et al. Exclusive Licensee Science and Technology Review Publishing House.
dc.rights Distributed under a Creative Commons Attribution License (CC BY 4.0).
dc.rights Atribución 3.0 España
dc.rights.uri http://creativecommons.org/licenses/by/3.0/es/
dc.subject.other Cloaks
dc.subject.other Metamaterials
dc.title Ultrathin Acoustic Parity-Time Symmetric Metasurface Cloak
dc.type article
dc.subject.eciencia Física
dc.identifier.doi https://doi.org/10.34133/2019/8345683
dc.rights.accessRights openAccess
dc.relation.projectID info:eu-repo/grantAgreement/EC/H2020/714577/PHONOMETA
dc.relation.projectID Gobierno de España. RYC-2016-21188
dc.relation.projectID Gobierno de España. RYC-2015-17156
dc.type.version publishedVersion
dc.identifier.publicationfirstpage 1
dc.identifier.publicationissue 8345683
dc.identifier.publicationlastpage 7
dc.identifier.publicationtitle Research: a science parner journal
dc.identifier.publicationvolume 2019
dc.identifier.uxxi AR/0000026449
dc.contributor.funder European Commission
dc.contributor.funder Ministerio de Economía y Competitividad (España)
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