Anomalous refraction of airborne sound through ultrathin metasurfaces

Similar to their optic counterparts, acoustic components are anticipated to flexibly tailor the propagation of sound. However, the practical applications, e.g. for audible sound with large wavelengths, are frequently hampered by the issue of device thickness. Here we present an effective design of m...

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Autores principales: Tang, Kun, Qiu, Chunyin, Ke, Manzhu, Lu, Jiuyang, Ye, Yangtao, Liu, Zhengyou
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4180806/
https://www.ncbi.nlm.nih.gov/pubmed/25269757
http://dx.doi.org/10.1038/srep06517
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author Tang, Kun
Qiu, Chunyin
Ke, Manzhu
Lu, Jiuyang
Ye, Yangtao
Liu, Zhengyou
author_facet Tang, Kun
Qiu, Chunyin
Ke, Manzhu
Lu, Jiuyang
Ye, Yangtao
Liu, Zhengyou
author_sort Tang, Kun
collection PubMed
description Similar to their optic counterparts, acoustic components are anticipated to flexibly tailor the propagation of sound. However, the practical applications, e.g. for audible sound with large wavelengths, are frequently hampered by the issue of device thickness. Here we present an effective design of metasurface structures that can deflect the transmitted airborne sound in an anomalous way. This flat lens, made of spatially varied coiling-slit subunits, has a thickness of deep subwavelength. By elaborately optimizing its microstructures, the proposed lens exhibits high performance in steering sound wavefronts. Good agreement has been demonstrated experimentally by a sample around the frequency 2.55 kHz, incident with a Gaussian beam at normal or oblique incidence. This study may open new avenues for numerous daily life applications, such as controlling indoor sound effects by decorating rooms with light metasurface walls.
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spelling pubmed-41808062014-10-02 Anomalous refraction of airborne sound through ultrathin metasurfaces Tang, Kun Qiu, Chunyin Ke, Manzhu Lu, Jiuyang Ye, Yangtao Liu, Zhengyou Sci Rep Article Similar to their optic counterparts, acoustic components are anticipated to flexibly tailor the propagation of sound. However, the practical applications, e.g. for audible sound with large wavelengths, are frequently hampered by the issue of device thickness. Here we present an effective design of metasurface structures that can deflect the transmitted airborne sound in an anomalous way. This flat lens, made of spatially varied coiling-slit subunits, has a thickness of deep subwavelength. By elaborately optimizing its microstructures, the proposed lens exhibits high performance in steering sound wavefronts. Good agreement has been demonstrated experimentally by a sample around the frequency 2.55 kHz, incident with a Gaussian beam at normal or oblique incidence. This study may open new avenues for numerous daily life applications, such as controlling indoor sound effects by decorating rooms with light metasurface walls. Nature Publishing Group 2014-10-01 /pmc/articles/PMC4180806/ /pubmed/25269757 http://dx.doi.org/10.1038/srep06517 Text en Copyright © 2014, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder in order to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Tang, Kun
Qiu, Chunyin
Ke, Manzhu
Lu, Jiuyang
Ye, Yangtao
Liu, Zhengyou
Anomalous refraction of airborne sound through ultrathin metasurfaces
title Anomalous refraction of airborne sound through ultrathin metasurfaces
title_full Anomalous refraction of airborne sound through ultrathin metasurfaces
title_fullStr Anomalous refraction of airborne sound through ultrathin metasurfaces
title_full_unstemmed Anomalous refraction of airborne sound through ultrathin metasurfaces
title_short Anomalous refraction of airborne sound through ultrathin metasurfaces
title_sort anomalous refraction of airborne sound through ultrathin metasurfaces
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4180806/
https://www.ncbi.nlm.nih.gov/pubmed/25269757
http://dx.doi.org/10.1038/srep06517
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