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Tailored elastic surface to body wave Umklapp conversion
Elastic waves guided along surfaces dominate applications in geophysics, ultrasonic inspection, mechanical vibration, and surface acoustic wave devices; precise manipulation of surface Rayleigh waves and their coupling with polarised body waves presents a challenge that offers to unlock the flexibil...
Autores principales: | , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7324571/ https://www.ncbi.nlm.nih.gov/pubmed/32601307 http://dx.doi.org/10.1038/s41467-020-17021-x |
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author | Chaplain, Gregory J. De Ponti, Jacopo M. Colombi, Andrea Fuentes-Dominguez, Rafael Dryburg, Paul Pieris, Don Smith, Richard J. Clare, Adam Clark, Matt Craster, Richard V. |
author_facet | Chaplain, Gregory J. De Ponti, Jacopo M. Colombi, Andrea Fuentes-Dominguez, Rafael Dryburg, Paul Pieris, Don Smith, Richard J. Clare, Adam Clark, Matt Craster, Richard V. |
author_sort | Chaplain, Gregory J. |
collection | PubMed |
description | Elastic waves guided along surfaces dominate applications in geophysics, ultrasonic inspection, mechanical vibration, and surface acoustic wave devices; precise manipulation of surface Rayleigh waves and their coupling with polarised body waves presents a challenge that offers to unlock the flexibility in wave transport required for efficient energy harvesting and vibration mitigation devices. We design elastic metasurfaces, consisting of a graded array of rod resonators attached to an elastic substrate that, together with critical insight from Umklapp scattering in phonon-electron systems, allow us to leverage the transfer of crystal momentum; we mode-convert Rayleigh surface waves into bulk waves that form tunable beams. Experiments, theory and simulation verify that these tailored Umklapp mechanisms play a key role in coupling surface Rayleigh waves to reversed bulk shear and compressional waves independently, thereby creating passive self-phased arrays allowing for tunable redirection and wave focusing within the bulk medium. |
format | Online Article Text |
id | pubmed-7324571 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-73245712020-07-06 Tailored elastic surface to body wave Umklapp conversion Chaplain, Gregory J. De Ponti, Jacopo M. Colombi, Andrea Fuentes-Dominguez, Rafael Dryburg, Paul Pieris, Don Smith, Richard J. Clare, Adam Clark, Matt Craster, Richard V. Nat Commun Article Elastic waves guided along surfaces dominate applications in geophysics, ultrasonic inspection, mechanical vibration, and surface acoustic wave devices; precise manipulation of surface Rayleigh waves and their coupling with polarised body waves presents a challenge that offers to unlock the flexibility in wave transport required for efficient energy harvesting and vibration mitigation devices. We design elastic metasurfaces, consisting of a graded array of rod resonators attached to an elastic substrate that, together with critical insight from Umklapp scattering in phonon-electron systems, allow us to leverage the transfer of crystal momentum; we mode-convert Rayleigh surface waves into bulk waves that form tunable beams. Experiments, theory and simulation verify that these tailored Umklapp mechanisms play a key role in coupling surface Rayleigh waves to reversed bulk shear and compressional waves independently, thereby creating passive self-phased arrays allowing for tunable redirection and wave focusing within the bulk medium. Nature Publishing Group UK 2020-06-29 /pmc/articles/PMC7324571/ /pubmed/32601307 http://dx.doi.org/10.1038/s41467-020-17021-x Text en © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Chaplain, Gregory J. De Ponti, Jacopo M. Colombi, Andrea Fuentes-Dominguez, Rafael Dryburg, Paul Pieris, Don Smith, Richard J. Clare, Adam Clark, Matt Craster, Richard V. Tailored elastic surface to body wave Umklapp conversion |
title | Tailored elastic surface to body wave Umklapp conversion |
title_full | Tailored elastic surface to body wave Umklapp conversion |
title_fullStr | Tailored elastic surface to body wave Umklapp conversion |
title_full_unstemmed | Tailored elastic surface to body wave Umklapp conversion |
title_short | Tailored elastic surface to body wave Umklapp conversion |
title_sort | tailored elastic surface to body wave umklapp conversion |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7324571/ https://www.ncbi.nlm.nih.gov/pubmed/32601307 http://dx.doi.org/10.1038/s41467-020-17021-x |
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