The acoustic phase resonances and surface waves supported by a compound rigid grating

We study the radiative and bound acoustic modes supported by a rigid grating formed of three same-depth, narrow grooves per unit cell. One of the grooves is twice the width of the other two, forming a ‘compound’ grating. The structure supports so-called ‘phase’ resonances where the phase difference...

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Autores principales: Beadle, Joseph G., Starkey, Timothy, Dockrey, Joseph A., Sambles, J. Roy, Hibbins, Alastair P.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2018
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6048070/
https://www.ncbi.nlm.nih.gov/pubmed/30013075
http://dx.doi.org/10.1038/s41598-018-29149-4
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author Beadle, Joseph G.
Starkey, Timothy
Dockrey, Joseph A.
Sambles, J. Roy
Hibbins, Alastair P.
author_facet Beadle, Joseph G.
Starkey, Timothy
Dockrey, Joseph A.
Sambles, J. Roy
Hibbins, Alastair P.
author_sort Beadle, Joseph G.
collection PubMed
description We study the radiative and bound acoustic modes supported by a rigid grating formed of three same-depth, narrow grooves per unit cell. One of the grooves is twice the width of the other two, forming a ‘compound’ grating. The structure supports so-called ‘phase’ resonances where the phase difference of the pressure field between the grooves on resonance varies by multiples of π. We explore the dispersion of these modes experimentally by monitoring the specularly reflected signal as a function of the angle of incidence. In addition, by near-field excitation, the dispersion of the non-radiative surface modes has been characterised. Our results are compared with the predictions of a finite element method model.
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spelling pubmed-60480702018-07-19 The acoustic phase resonances and surface waves supported by a compound rigid grating Beadle, Joseph G. Starkey, Timothy Dockrey, Joseph A. Sambles, J. Roy Hibbins, Alastair P. Sci Rep Article We study the radiative and bound acoustic modes supported by a rigid grating formed of three same-depth, narrow grooves per unit cell. One of the grooves is twice the width of the other two, forming a ‘compound’ grating. The structure supports so-called ‘phase’ resonances where the phase difference of the pressure field between the grooves on resonance varies by multiples of π. We explore the dispersion of these modes experimentally by monitoring the specularly reflected signal as a function of the angle of incidence. In addition, by near-field excitation, the dispersion of the non-radiative surface modes has been characterised. Our results are compared with the predictions of a finite element method model. Nature Publishing Group UK 2018-07-16 /pmc/articles/PMC6048070/ /pubmed/30013075 http://dx.doi.org/10.1038/s41598-018-29149-4 Text en © The Author(s) 2018 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
Beadle, Joseph G.
Starkey, Timothy
Dockrey, Joseph A.
Sambles, J. Roy
Hibbins, Alastair P.
The acoustic phase resonances and surface waves supported by a compound rigid grating
title The acoustic phase resonances and surface waves supported by a compound rigid grating
title_full The acoustic phase resonances and surface waves supported by a compound rigid grating
title_fullStr The acoustic phase resonances and surface waves supported by a compound rigid grating
title_full_unstemmed The acoustic phase resonances and surface waves supported by a compound rigid grating
title_short The acoustic phase resonances and surface waves supported by a compound rigid grating
title_sort acoustic phase resonances and surface waves supported by a compound rigid grating
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6048070/
https://www.ncbi.nlm.nih.gov/pubmed/30013075
http://dx.doi.org/10.1038/s41598-018-29149-4
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