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Soft 3D acoustic metamaterial with negative index

hal.structure.identifierInstitut de Mécanique et d'Ingénierie de Bordeaux [I2M]
dc.contributor.authorBRUNET, Thomas
hal.structure.identifierCentre de recherches Paul Pascal [CRPP]
dc.contributor.authorMERLIN, Aurore
hal.structure.identifierInstitut de Mécanique et d'Ingénierie de Bordeaux [I2M]
dc.contributor.authorMASCARO, Benoit
hal.structure.identifierCentre de recherches Paul Pascal [CRPP]
dc.contributor.authorZIMNY, Kevin
dc.contributor.authorLENG, Jacques
hal.structure.identifierInstitut de Mécanique et d'Ingénierie de Bordeaux [I2M]
dc.contributor.authorPONCELET, Olivier
hal.structure.identifierInstitut de Mécanique et d'Ingénierie de Bordeaux [I2M]
dc.contributor.authorARISTÉGUI, Christophe
hal.structure.identifierCentre de recherches Paul Pascal [CRPP]
dc.contributor.authorMONDAIN-MONVAL, Olivier
IDREF: 084112654
dc.date.accessioned2021-05-14T09:33:58Z
dc.date.available2021-05-14T09:33:58Z
dc.date.issued2014-11-04
dc.identifier.issn1476-1122
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/76092
dc.description.abstractEnMany efforts have been devoted to the design and achievement of negative-refractive-index metamaterials since the 2000s1, 2, 3, 4, 5, 6, 7, 8. One of the challenges at present is to extend that field beyond electromagnetism by realizing three-dimensional (3D) media with negative acoustic indices9. We report a new class of locally resonant ultrasonic metafluids consisting of a concentrated suspension of macroporous microbeads engineered using soft-matter techniques. The propagation of Gaussian pulses within these random distributions of ‘ultra-slow’ Mie resonators is investigated through in situ ultrasonic experiments. The real part of the acoustic index is shown to be negative (up to almost − 1) over broad frequency bandwidths, depending on the volume fraction of the microbeads as predicted by multiple-scattering calculations. These soft 3D acoustic metamaterials open the way for key applications such as sub-wavelength imaging and transformation acoustics, which require the production of acoustic devices with negative or zero-valued indices.
dc.description.sponsorshipAdvanced Materials by Design - ANR-10-LABX-0042
dc.description.sponsorshipInitiative d'excellence de l'Université de Bordeaux - ANR-10-IDEX-0003
dc.language.isoen
dc.publisherNature Publishing Group
dc.subject.enAcoustic Metamaterials
dc.title.enSoft 3D acoustic metamaterial with negative index
dc.typeArticle de revue
dc.identifier.doi10.1038/nmat4164
dc.subject.halPhysique [physics]/Physique [physics]
bordeaux.journalNature Materials
bordeaux.pagepp. 384–388
bordeaux.volume14
bordeaux.hal.laboratoriesInstitut de Mécanique et d’Ingénierie de Bordeaux (I2M) - UMR 5295*
bordeaux.institutionUniversité de Bordeaux
bordeaux.institutionBordeaux INP
bordeaux.institutionCNRS
bordeaux.institutionINRAE
bordeaux.institutionArts et Métiers
bordeaux.peerReviewedoui
hal.identifierhal-01146463
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01146463v1
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