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A highly attenuating and frequency tailorable annular hole phononic crystal for surface acoustic waves

Surface acoustic wave (SAW) devices are widely used for signal processing, sensing and increasingly for lab-on-a-chip applications. Phononic crystals can control the propagation of SAW, analogous to photonic crystals, enabling components such as waveguides and cavities. Here we present an approach f...

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Autores principales: Ash, B. J., Worsfold, S. R., Vukusic, P., Nash, G. R.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5539253/
https://www.ncbi.nlm.nih.gov/pubmed/28765535
http://dx.doi.org/10.1038/s41467-017-00278-0
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author Ash, B. J.
Worsfold, S. R.
Vukusic, P.
Nash, G. R.
author_facet Ash, B. J.
Worsfold, S. R.
Vukusic, P.
Nash, G. R.
author_sort Ash, B. J.
collection PubMed
description Surface acoustic wave (SAW) devices are widely used for signal processing, sensing and increasingly for lab-on-a-chip applications. Phononic crystals can control the propagation of SAW, analogous to photonic crystals, enabling components such as waveguides and cavities. Here we present an approach for the realisation of robust, tailorable SAW phononic crystals, based on annular holes patterned in a SAW substrate. Using simulations and experiments, we show that this geometry supports local resonances which create highly attenuating phononic bandgaps at frequencies with negligible coupling of SAWs into other modes, even for relatively shallow features. The enormous bandgap attenuation is up to an order-of-magnitude larger than that achieved with a pillar phononic crystal of the same size, enabling effective phononic crystals to be made up of smaller numbers of elements. This work transforms the ability to exploit phononic crystals for developing novel SAW device concepts, mirroring contemporary progress in photonic crystals.
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spelling pubmed-55392532017-08-08 A highly attenuating and frequency tailorable annular hole phononic crystal for surface acoustic waves Ash, B. J. Worsfold, S. R. Vukusic, P. Nash, G. R. Nat Commun Article Surface acoustic wave (SAW) devices are widely used for signal processing, sensing and increasingly for lab-on-a-chip applications. Phononic crystals can control the propagation of SAW, analogous to photonic crystals, enabling components such as waveguides and cavities. Here we present an approach for the realisation of robust, tailorable SAW phononic crystals, based on annular holes patterned in a SAW substrate. Using simulations and experiments, we show that this geometry supports local resonances which create highly attenuating phononic bandgaps at frequencies with negligible coupling of SAWs into other modes, even for relatively shallow features. The enormous bandgap attenuation is up to an order-of-magnitude larger than that achieved with a pillar phononic crystal of the same size, enabling effective phononic crystals to be made up of smaller numbers of elements. This work transforms the ability to exploit phononic crystals for developing novel SAW device concepts, mirroring contemporary progress in photonic crystals. Nature Publishing Group UK 2017-08-02 /pmc/articles/PMC5539253/ /pubmed/28765535 http://dx.doi.org/10.1038/s41467-017-00278-0 Text en © The Author(s) 2017 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
Ash, B. J.
Worsfold, S. R.
Vukusic, P.
Nash, G. R.
A highly attenuating and frequency tailorable annular hole phononic crystal for surface acoustic waves
title A highly attenuating and frequency tailorable annular hole phononic crystal for surface acoustic waves
title_full A highly attenuating and frequency tailorable annular hole phononic crystal for surface acoustic waves
title_fullStr A highly attenuating and frequency tailorable annular hole phononic crystal for surface acoustic waves
title_full_unstemmed A highly attenuating and frequency tailorable annular hole phononic crystal for surface acoustic waves
title_short A highly attenuating and frequency tailorable annular hole phononic crystal for surface acoustic waves
title_sort highly attenuating and frequency tailorable annular hole phononic crystal for surface acoustic waves
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5539253/
https://www.ncbi.nlm.nih.gov/pubmed/28765535
http://dx.doi.org/10.1038/s41467-017-00278-0
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