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Broadband evolution of phononic-crystal-waveguide eigenstates in real- and k-spaces

Control of sound in phononic band-gap structures promises novel control and guiding mechanisms. Designs in photonic systems were quickly matched in phononics, and rows of defects in phononic crystals were shown to guide sound waves effectively. The vast majority of work in such phononic guiding has...

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Autores principales: Otsuka, P. H., Nanri, K., Matsuda, O., Tomoda, M., Profunser, D. M., Veres, I. A., Danworaphong, S., Khelif, A., Benchabane, S., Laude, V., Wright, O. B.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2013
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3842087/
https://www.ncbi.nlm.nih.gov/pubmed/24284621
http://dx.doi.org/10.1038/srep03351
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author Otsuka, P. H.
Nanri, K.
Matsuda, O.
Tomoda, M.
Profunser, D. M.
Veres, I. A.
Danworaphong, S.
Khelif, A.
Benchabane, S.
Laude, V.
Wright, O. B.
author_facet Otsuka, P. H.
Nanri, K.
Matsuda, O.
Tomoda, M.
Profunser, D. M.
Veres, I. A.
Danworaphong, S.
Khelif, A.
Benchabane, S.
Laude, V.
Wright, O. B.
author_sort Otsuka, P. H.
collection PubMed
description Control of sound in phononic band-gap structures promises novel control and guiding mechanisms. Designs in photonic systems were quickly matched in phononics, and rows of defects in phononic crystals were shown to guide sound waves effectively. The vast majority of work in such phononic guiding has been in the frequency domain, because of the importance of the phononic dispersion relation in governing acoustic confinement in waveguides. However, frequency-domain studies miss vital information concerning the phase of the acoustic field and eigenstate coupling. Using a wide range of wavevectors k, we implement an ultrafast technique to probe the wave field evolution in straight and L-shaped phononic crystal surface-phonon waveguides in real- and k-space in two spatial dimensions, thus revealing the eigenstate-energy redistribution processes and the coupling between different frequency-degenerate eigenstates. Such use of k-t space is a first in acoustics, and should have other interesting applications such as acoustic-metamaterial characterization.
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spelling pubmed-38420872013-11-27 Broadband evolution of phononic-crystal-waveguide eigenstates in real- and k-spaces Otsuka, P. H. Nanri, K. Matsuda, O. Tomoda, M. Profunser, D. M. Veres, I. A. Danworaphong, S. Khelif, A. Benchabane, S. Laude, V. Wright, O. B. Sci Rep Article Control of sound in phononic band-gap structures promises novel control and guiding mechanisms. Designs in photonic systems were quickly matched in phononics, and rows of defects in phononic crystals were shown to guide sound waves effectively. The vast majority of work in such phononic guiding has been in the frequency domain, because of the importance of the phononic dispersion relation in governing acoustic confinement in waveguides. However, frequency-domain studies miss vital information concerning the phase of the acoustic field and eigenstate coupling. Using a wide range of wavevectors k, we implement an ultrafast technique to probe the wave field evolution in straight and L-shaped phononic crystal surface-phonon waveguides in real- and k-space in two spatial dimensions, thus revealing the eigenstate-energy redistribution processes and the coupling between different frequency-degenerate eigenstates. Such use of k-t space is a first in acoustics, and should have other interesting applications such as acoustic-metamaterial characterization. Nature Publishing Group 2013-11-27 /pmc/articles/PMC3842087/ /pubmed/24284621 http://dx.doi.org/10.1038/srep03351 Text en Copyright © 2013, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by-nc-nd/3.0/ This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/3.0/
spellingShingle Article
Otsuka, P. H.
Nanri, K.
Matsuda, O.
Tomoda, M.
Profunser, D. M.
Veres, I. A.
Danworaphong, S.
Khelif, A.
Benchabane, S.
Laude, V.
Wright, O. B.
Broadband evolution of phononic-crystal-waveguide eigenstates in real- and k-spaces
title Broadband evolution of phononic-crystal-waveguide eigenstates in real- and k-spaces
title_full Broadband evolution of phononic-crystal-waveguide eigenstates in real- and k-spaces
title_fullStr Broadband evolution of phononic-crystal-waveguide eigenstates in real- and k-spaces
title_full_unstemmed Broadband evolution of phononic-crystal-waveguide eigenstates in real- and k-spaces
title_short Broadband evolution of phononic-crystal-waveguide eigenstates in real- and k-spaces
title_sort broadband evolution of phononic-crystal-waveguide eigenstates in real- and k-spaces
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3842087/
https://www.ncbi.nlm.nih.gov/pubmed/24284621
http://dx.doi.org/10.1038/srep03351
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