Enhanced sensing and conversion of ultrasonic Rayleigh waves by elastic metasurfaces

Abstract Recent years have heralded the introduction of metasurfaces that advantageously combine the vision of sub-wavelength wave manipulation, with the design, fabrication and size advantages associated with surface excitation. An important topic within metasurfaces is the tailored rainbow trappin...

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Autores principales:	Andrea Colombi, Victoria Ageeva, Richard J. Smith, Adam Clare, Rikesh Patel, Matt Clark, Daniel Colquitt, Philippe Roux, Sebastien Guenneau, Richard V. Craster
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/5ff0a1a9648341a58308fff37eb4d10a
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spelling	oai:doaj.org-article:5ff0a1a9648341a58308fff37eb4d10a2021-12-02T11:40:23ZEnhanced sensing and conversion of ultrasonic Rayleigh waves by elastic metasurfaces10.1038/s41598-017-07151-62045-2322https://doaj.org/article/5ff0a1a9648341a58308fff37eb4d10a2017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-07151-6https://doaj.org/toc/2045-2322Abstract Recent years have heralded the introduction of metasurfaces that advantageously combine the vision of sub-wavelength wave manipulation, with the design, fabrication and size advantages associated with surface excitation. An important topic within metasurfaces is the tailored rainbow trapping and selective spatial frequency separation of electromagnetic and acoustic waves using graded metasurfaces. This frequency dependent trapping and spatial frequency segregation has implications for energy concentrators and associated energy harvesting, sensing and wave filtering techniques. Different demonstrations of acoustic and electromagnetic rainbow devices have been performed, however not for deep elastic substrates that support both shear and compressional waves, together with surface Rayleigh waves; these allow not only for Rayleigh wave rainbow effects to exist but also for mode conversion from surface into shear waves. Here we demonstrate experimentally not only elastic Rayleigh wave rainbow trapping, by taking advantage of a stop-band for surface waves, but also selective mode conversion of surface Rayleigh waves to shear waves. These experiments performed at ultrasonic frequencies, in the range of 400–600 kHz, are complemented by time domain numerical simulations. The metasurfaces we design are not limited to guided ultrasonic waves and are a general phenomenon in elastic waves that can be translated across scales.Andrea ColombiVictoria AgeevaRichard J. SmithAdam ClareRikesh PatelMatt ClarkDaniel ColquittPhilippe RouxSebastien GuenneauRichard V. CrasterNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Andrea Colombi Victoria Ageeva Richard J. Smith Adam Clare Rikesh Patel Matt Clark Daniel Colquitt Philippe Roux Sebastien Guenneau Richard V. Craster Enhanced sensing and conversion of ultrasonic Rayleigh waves by elastic metasurfaces
description	Abstract Recent years have heralded the introduction of metasurfaces that advantageously combine the vision of sub-wavelength wave manipulation, with the design, fabrication and size advantages associated with surface excitation. An important topic within metasurfaces is the tailored rainbow trapping and selective spatial frequency separation of electromagnetic and acoustic waves using graded metasurfaces. This frequency dependent trapping and spatial frequency segregation has implications for energy concentrators and associated energy harvesting, sensing and wave filtering techniques. Different demonstrations of acoustic and electromagnetic rainbow devices have been performed, however not for deep elastic substrates that support both shear and compressional waves, together with surface Rayleigh waves; these allow not only for Rayleigh wave rainbow effects to exist but also for mode conversion from surface into shear waves. Here we demonstrate experimentally not only elastic Rayleigh wave rainbow trapping, by taking advantage of a stop-band for surface waves, but also selective mode conversion of surface Rayleigh waves to shear waves. These experiments performed at ultrasonic frequencies, in the range of 400–600 kHz, are complemented by time domain numerical simulations. The metasurfaces we design are not limited to guided ultrasonic waves and are a general phenomenon in elastic waves that can be translated across scales.
format	article
author	Andrea Colombi Victoria Ageeva Richard J. Smith Adam Clare Rikesh Patel Matt Clark Daniel Colquitt Philippe Roux Sebastien Guenneau Richard V. Craster
author_facet	Andrea Colombi Victoria Ageeva Richard J. Smith Adam Clare Rikesh Patel Matt Clark Daniel Colquitt Philippe Roux Sebastien Guenneau Richard V. Craster
author_sort	Andrea Colombi
title	Enhanced sensing and conversion of ultrasonic Rayleigh waves by elastic metasurfaces
title_short	Enhanced sensing and conversion of ultrasonic Rayleigh waves by elastic metasurfaces
title_full	Enhanced sensing and conversion of ultrasonic Rayleigh waves by elastic metasurfaces
title_fullStr	Enhanced sensing and conversion of ultrasonic Rayleigh waves by elastic metasurfaces
title_full_unstemmed	Enhanced sensing and conversion of ultrasonic Rayleigh waves by elastic metasurfaces
title_sort	enhanced sensing and conversion of ultrasonic rayleigh waves by elastic metasurfaces
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/5ff0a1a9648341a58308fff37eb4d10a
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Enhanced sensing and conversion of ultrasonic Rayleigh waves by elastic metasurfaces

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