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Dial-in Topological Metamaterials Based on Bistable Stewart Platform
Recently, there have been significant efforts to guide mechanical energy in structures by relying on a novel topological framework popularized by the discovery of topological insulators. Here, we propose a topological metamaterial system based on the design of the Stewart Platform, which can not onl...
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/PMC5758775/ https://www.ncbi.nlm.nih.gov/pubmed/29311584 http://dx.doi.org/10.1038/s41598-017-18410-x |
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author | Wu, Ying Chaunsali, Rajesh Yasuda, Hiromi Yu, Kaiping Yang, Jinkyu |
author_facet | Wu, Ying Chaunsali, Rajesh Yasuda, Hiromi Yu, Kaiping Yang, Jinkyu |
author_sort | Wu, Ying |
collection | PubMed |
description | Recently, there have been significant efforts to guide mechanical energy in structures by relying on a novel topological framework popularized by the discovery of topological insulators. Here, we propose a topological metamaterial system based on the design of the Stewart Platform, which can not only guide mechanical waves robustly in a desired path, but also can be tuned in situ to change this wave path at will. Without resorting to any active materials, the current system harnesses bistablilty in its unit cells, such that tuning can be performed simply by a dial-in action. Consequently, a topological transition mechanism inspired by the quantum valley Hall effect can be achieved. We show the possibility of tuning in a variety of topological and traditional waveguides in the same system, and numerically investigate key qualitative and quantitative differences between them. We observe that even though both types of waveguides can lead to significant wave transmission for a certain frequency range, topological waveguides are distinctive as they support robust, back scattering immune, one-way wave propagation. |
format | Online Article Text |
id | pubmed-5758775 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-57587752018-01-10 Dial-in Topological Metamaterials Based on Bistable Stewart Platform Wu, Ying Chaunsali, Rajesh Yasuda, Hiromi Yu, Kaiping Yang, Jinkyu Sci Rep Article Recently, there have been significant efforts to guide mechanical energy in structures by relying on a novel topological framework popularized by the discovery of topological insulators. Here, we propose a topological metamaterial system based on the design of the Stewart Platform, which can not only guide mechanical waves robustly in a desired path, but also can be tuned in situ to change this wave path at will. Without resorting to any active materials, the current system harnesses bistablilty in its unit cells, such that tuning can be performed simply by a dial-in action. Consequently, a topological transition mechanism inspired by the quantum valley Hall effect can be achieved. We show the possibility of tuning in a variety of topological and traditional waveguides in the same system, and numerically investigate key qualitative and quantitative differences between them. We observe that even though both types of waveguides can lead to significant wave transmission for a certain frequency range, topological waveguides are distinctive as they support robust, back scattering immune, one-way wave propagation. Nature Publishing Group UK 2018-01-08 /pmc/articles/PMC5758775/ /pubmed/29311584 http://dx.doi.org/10.1038/s41598-017-18410-x 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 Wu, Ying Chaunsali, Rajesh Yasuda, Hiromi Yu, Kaiping Yang, Jinkyu Dial-in Topological Metamaterials Based on Bistable Stewart Platform |
title | Dial-in Topological Metamaterials Based on Bistable Stewart Platform |
title_full | Dial-in Topological Metamaterials Based on Bistable Stewart Platform |
title_fullStr | Dial-in Topological Metamaterials Based on Bistable Stewart Platform |
title_full_unstemmed | Dial-in Topological Metamaterials Based on Bistable Stewart Platform |
title_short | Dial-in Topological Metamaterials Based on Bistable Stewart Platform |
title_sort | dial-in topological metamaterials based on bistable stewart platform |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5758775/ https://www.ncbi.nlm.nih.gov/pubmed/29311584 http://dx.doi.org/10.1038/s41598-017-18410-x |
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