| Title: |
Phonon transmission through a nonlocal metamaterial slab |
| Authors: |
Yi Chen, Ke Wang, Muamer Kadic, Sebastien Guenneau, Changguo Wang, Martin Wegener |
| Source: |
Communications Physics, Vol 6, Iss 1, Pp 1-11 (2023) |
| Publisher Information: |
Nature Portfolio, 2023. |
| Publication Year: |
2023 |
| Collection: |
LCC:Astrophysics
LCC:Physics |
| Subject Terms: |
Astrophysics, QB460-466, Physics, QC1-999 |
| More Details: |
Abstract Previous theory and experiment has shown that introducing strong (nonlocal) beyond-nearest-neighbor interactions in addition to (local) nearest-neighbor interactions into rationally designed periodic lattices called metamaterials can lead to unusual wave dispersion relations of the lowest band. For roton-like dispersions, this especially includes the possibility of multiple solutions for the wavenumber at a given frequency. Here, we study the one-dimensional frequency-dependent acoustical phonon transmission of a slab of such nonlocal metamaterial in a local surrounding. In addition to the usual Fabry-Perot resonances, we find a series of bound states in the continuum. In their vicinity, sharp Fano-type transmission resonances occur, with sharp zero-transmission minima next to sharp transmission maxima. Our theoretical discussion starts with a discrete mass-and-spring model. We compare these results with solutions of a generalized wave equation for heterogeneous nonlocal effective media. We validate our findings by numerical calculations on three-dimensional metamaterial microstructures for one-dimensional acoustical wave propagation. |
| Document Type: |
article |
| File Description: |
electronic resource |
| Language: |
English |
| ISSN: |
2399-3650 |
| Relation: |
https://doaj.org/toc/2399-3650 |
| DOI: |
10.1038/s42005-023-01184-2 |
| Access URL: |
https://doaj.org/article/9730badbceb146d6a2d029679df1ce01 |
| Accession Number: |
edsdoj.9730badbceb146d6a2d029679df1ce01 |
| Database: |
Directory of Open Access Journals |
