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Broadband single-phase hyperbolic elastic metamaterials for super-resolution imaging
Hyperbolic metamaterials, the highly anisotropic subwavelength media, immensely widen the engineering feasibilities for wave manipulation. However, limited by the empirical structural topologies, the reported hyperbolic elastic metamaterials (HEMMs) suffer from the limitations of the relatively narr...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5797129/ https://www.ncbi.nlm.nih.gov/pubmed/29396494 http://dx.doi.org/10.1038/s41598-018-20579-8 |
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author | Dong, Hao-Wen Zhao, Sheng-Dong Wang, Yue-Sheng Zhang, Chuanzeng |
author_facet | Dong, Hao-Wen Zhao, Sheng-Dong Wang, Yue-Sheng Zhang, Chuanzeng |
author_sort | Dong, Hao-Wen |
collection | PubMed |
description | Hyperbolic metamaterials, the highly anisotropic subwavelength media, immensely widen the engineering feasibilities for wave manipulation. However, limited by the empirical structural topologies, the reported hyperbolic elastic metamaterials (HEMMs) suffer from the limitations of the relatively narrow frequency width, inflexible adjustable operating subwavelength scale and difficulty to further improve the imaging resolution. Here, we show an inverse-design strategy for HEMMs by topology optimization. We design broadband single-phase HEMMs supporting multipolar resonances at different prescribed deep-subwavelength scales, and demonstrate the super-resolution imaging for longitudinal waves. Benefiting from the extreme enhancement of the evanescent waves, an optimized HEMM at an ultra-low frequency can yield an imaging resolution of ~λ/64, representing the record in the field of elastic metamaterials. The present research provides a novel and general design methodology for exploring the HEMMs with unrevealed mechanisms and guides the ultrasonography and general biomedical applications. |
format | Online Article Text |
id | pubmed-5797129 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-57971292018-02-12 Broadband single-phase hyperbolic elastic metamaterials for super-resolution imaging Dong, Hao-Wen Zhao, Sheng-Dong Wang, Yue-Sheng Zhang, Chuanzeng Sci Rep Article Hyperbolic metamaterials, the highly anisotropic subwavelength media, immensely widen the engineering feasibilities for wave manipulation. However, limited by the empirical structural topologies, the reported hyperbolic elastic metamaterials (HEMMs) suffer from the limitations of the relatively narrow frequency width, inflexible adjustable operating subwavelength scale and difficulty to further improve the imaging resolution. Here, we show an inverse-design strategy for HEMMs by topology optimization. We design broadband single-phase HEMMs supporting multipolar resonances at different prescribed deep-subwavelength scales, and demonstrate the super-resolution imaging for longitudinal waves. Benefiting from the extreme enhancement of the evanescent waves, an optimized HEMM at an ultra-low frequency can yield an imaging resolution of ~λ/64, representing the record in the field of elastic metamaterials. The present research provides a novel and general design methodology for exploring the HEMMs with unrevealed mechanisms and guides the ultrasonography and general biomedical applications. Nature Publishing Group UK 2018-02-02 /pmc/articles/PMC5797129/ /pubmed/29396494 http://dx.doi.org/10.1038/s41598-018-20579-8 Text en © The Author(s) 2018 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 Dong, Hao-Wen Zhao, Sheng-Dong Wang, Yue-Sheng Zhang, Chuanzeng Broadband single-phase hyperbolic elastic metamaterials for super-resolution imaging |
title | Broadband single-phase hyperbolic elastic metamaterials for super-resolution imaging |
title_full | Broadband single-phase hyperbolic elastic metamaterials for super-resolution imaging |
title_fullStr | Broadband single-phase hyperbolic elastic metamaterials for super-resolution imaging |
title_full_unstemmed | Broadband single-phase hyperbolic elastic metamaterials for super-resolution imaging |
title_short | Broadband single-phase hyperbolic elastic metamaterials for super-resolution imaging |
title_sort | broadband single-phase hyperbolic elastic metamaterials for super-resolution imaging |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5797129/ https://www.ncbi.nlm.nih.gov/pubmed/29396494 http://dx.doi.org/10.1038/s41598-018-20579-8 |
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