Localized modes on a metasurface through multi-wave interactions
Abstract
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 beam-plate 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 systel 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.
Cite
@article{arxiv.1912.11530,
title = {Localized modes on a metasurface through multi-wave interactions},
author = {Martin Lott and Philippe Roux and Léonard Seydoux and Benoit Tallon and Adrien Pelat and Sergey Skipetrov and Andrea Colombi},
journal= {arXiv preprint arXiv:1912.11530},
year = {2020}
}
Comments
7 pages, 6 figures, regular paper