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Article Dans Une Revue Physical Review Materials Année : 2020

Localized modes on a metasurface through multi-wave interactions

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Résumé

In this paper, we describe the manifestation of localized states through coherent and incoherent analyses of a diffuse elastic wavefield inside a two-dimensional metamaterial made of a collection of vertical long beams glued to a thin plate. We demonstrate that localized states arise due to multi-wave interactions at the beamplate attachment when the beams acts as coupled resonators for both compressional and flexural resonances on the metasurface. Due to the low-quality factor compressional resonance of the beams, inside the main bandgap the modal density of the system drops to near a high-quality factor flexural resonance of the beams, and blocks the diffusion process of the wavefield intensity. This experiment physically highlights the tight-binding-like coupling in the localized regime for this two-dimensional metamaterial.
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Dates et versions

hal-02886354 , version 1 (01-07-2020)

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Martin Lott, Philippe Roux, Léonard Seydoux, Benoit Tallon, Adrien Pelat, et al.. Localized modes on a metasurface through multi-wave interactions. Physical Review Materials, 2020, 4 (6), ⟨10.1103/PhysRevMaterials.4.065203⟩. ⟨hal-02886354⟩
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