Control of Love waves by resonant metasurfaces

Abstract Metasurfaces of mechanical resonators have been successfully used to control in-plane polarized surface waves for filtering, waveguiding and lensing applications across different length scales. In this work, we extend the concept of metasurfaces to anti-plane surface waves existing in semi-...

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Autores principales:	Antonio Palermo, Alessandro Marzani
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/c790c22647df4cfa9f0e145cafdb86d6
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spelling	oai:doaj.org-article:c790c22647df4cfa9f0e145cafdb86d62021-12-02T11:40:34ZControl of Love waves by resonant metasurfaces10.1038/s41598-018-25503-82045-2322https://doaj.org/article/c790c22647df4cfa9f0e145cafdb86d62018-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-25503-8https://doaj.org/toc/2045-2322Abstract Metasurfaces of mechanical resonators have been successfully used to control in-plane polarized surface waves for filtering, waveguiding and lensing applications across different length scales. In this work, we extend the concept of metasurfaces to anti-plane surface waves existing in semi-infinite layered media, generally known as Love waves. By means of an effective medium approach, we derive an original closed-form dispersion relation for the metasurface. This relation reveals the possibility to control the Love waves dispersive properties by varying the resonators mechanical parameters. We exploit this capability to manipulate the metasurface refractive index and design two gradient index (GRIN) metalenses, i.e. a Luneburg lens and a Maxwell lens. We confirm the performance of the designed lenses using full 3D finite element simulations. Our work demonstrates the possibility of realizing wave control devices for anti-plane waves.Antonio PalermoAlessandro MarzaniNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-8 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Antonio Palermo Alessandro Marzani Control of Love waves by resonant metasurfaces
description	Abstract Metasurfaces of mechanical resonators have been successfully used to control in-plane polarized surface waves for filtering, waveguiding and lensing applications across different length scales. In this work, we extend the concept of metasurfaces to anti-plane surface waves existing in semi-infinite layered media, generally known as Love waves. By means of an effective medium approach, we derive an original closed-form dispersion relation for the metasurface. This relation reveals the possibility to control the Love waves dispersive properties by varying the resonators mechanical parameters. We exploit this capability to manipulate the metasurface refractive index and design two gradient index (GRIN) metalenses, i.e. a Luneburg lens and a Maxwell lens. We confirm the performance of the designed lenses using full 3D finite element simulations. Our work demonstrates the possibility of realizing wave control devices for anti-plane waves.
format	article
author	Antonio Palermo Alessandro Marzani
author_facet	Antonio Palermo Alessandro Marzani
author_sort	Antonio Palermo
title	Control of Love waves by resonant metasurfaces
title_short	Control of Love waves by resonant metasurfaces
title_full	Control of Love waves by resonant metasurfaces
title_fullStr	Control of Love waves by resonant metasurfaces
title_full_unstemmed	Control of Love waves by resonant metasurfaces
title_sort	control of love waves by resonant metasurfaces
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/c790c22647df4cfa9f0e145cafdb86d6
work_keys_str_mv	AT antoniopalermo controloflovewavesbyresonantmetasurfaces AT alessandromarzani controloflovewavesbyresonantmetasurfaces
_version_	1718395606040313856

Control of Love waves by resonant metasurfaces

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