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Acoustic metamaterial for subwavelength edge detection
Metamaterials have demonstrated the possibility to produce super-resolved images by restoring propagative and evanescent waves. However, for efficient information transfer, for example, in compressed sensing, it is often desirable to visualize only the fast spatial variations of the wave field (carr...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Pub. Group
2015
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4560791/ https://www.ncbi.nlm.nih.gov/pubmed/26304739 http://dx.doi.org/10.1038/ncomms9037 |
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author | Molerón, Miguel Daraio, Chiara |
author_facet | Molerón, Miguel Daraio, Chiara |
author_sort | Molerón, Miguel |
collection | PubMed |
description | Metamaterials have demonstrated the possibility to produce super-resolved images by restoring propagative and evanescent waves. However, for efficient information transfer, for example, in compressed sensing, it is often desirable to visualize only the fast spatial variations of the wave field (carried by evanescent waves), as the one created by edges or small details. Image processing edge detection algorithms perform such operation, but they add time and complexity to the imaging process. Here we present an acoustic metamaterial that transmits only components of the acoustic field that are approximately equal to or smaller than the operating wavelength. The metamaterial converts evanescent waves into propagative waves exciting trapped resonances, and it uses periodicity to attenuate the propagative components. This approach achieves resolutions ∼5 times smaller than the operating wavelength and makes it possible to visualize independently edges aligned along different directions. |
format | Online Article Text |
id | pubmed-4560791 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | Nature Pub. Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-45607912015-09-14 Acoustic metamaterial for subwavelength edge detection Molerón, Miguel Daraio, Chiara Nat Commun Article Metamaterials have demonstrated the possibility to produce super-resolved images by restoring propagative and evanescent waves. However, for efficient information transfer, for example, in compressed sensing, it is often desirable to visualize only the fast spatial variations of the wave field (carried by evanescent waves), as the one created by edges or small details. Image processing edge detection algorithms perform such operation, but they add time and complexity to the imaging process. Here we present an acoustic metamaterial that transmits only components of the acoustic field that are approximately equal to or smaller than the operating wavelength. The metamaterial converts evanescent waves into propagative waves exciting trapped resonances, and it uses periodicity to attenuate the propagative components. This approach achieves resolutions ∼5 times smaller than the operating wavelength and makes it possible to visualize independently edges aligned along different directions. Nature Pub. Group 2015-08-25 /pmc/articles/PMC4560791/ /pubmed/26304739 http://dx.doi.org/10.1038/ncomms9037 Text en Copyright © 2015, Nature Publishing Group, a division of 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 to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Molerón, Miguel Daraio, Chiara Acoustic metamaterial for subwavelength edge detection |
title | Acoustic metamaterial for subwavelength edge detection |
title_full | Acoustic metamaterial for subwavelength edge detection |
title_fullStr | Acoustic metamaterial for subwavelength edge detection |
title_full_unstemmed | Acoustic metamaterial for subwavelength edge detection |
title_short | Acoustic metamaterial for subwavelength edge detection |
title_sort | acoustic metamaterial for subwavelength edge detection |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4560791/ https://www.ncbi.nlm.nih.gov/pubmed/26304739 http://dx.doi.org/10.1038/ncomms9037 |
work_keys_str_mv | AT moleronmiguel acousticmetamaterialforsubwavelengthedgedetection AT daraiochiara acousticmetamaterialforsubwavelengthedgedetection |