Localization and amplification of Rayleigh waves by topological elastic metasurfaces
Recently, the concept of metasurface becomes a hot research topic due to its outstanding advantages compared with its bulk counterpart metamaterial, such as low propagation loss, cheap fabrication cost, compact geometrical structure, high integration level, and specifically excellent performance in...
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sg-ntu-dr.10356-1606452022-07-29T03:02:31Z Localization and amplification of Rayleigh waves by topological elastic metasurfaces Zhou, Weijian Fan, Zheng School of Mechanical and Aerospace Engineering Engineering::Mechanical engineering Topological Metasurface Rayleigh Waves Recently, the concept of metasurface becomes a hot research topic due to its outstanding advantages compared with its bulk counterpart metamaterial, such as low propagation loss, cheap fabrication cost, compact geometrical structure, high integration level, and specifically excellent performance in wavefront manipulation. Instead of designing elastic metasurfaces for wavefront manipulation based on generalized Snell's law that have been widely studied, in this paper we focus on the topological performance of one dimensional elastic metasurface for manipulation of Rayleigh waves. We present two methods to design the topological metasurface, and several kinds of metasurfaces will be studied. We will show the existence of topologically protected interface modes in these topological metasurfaces that can realize energy localization around interfaces in the topological metasurface, and the displacement at the interface can be amplified more than two times than the input Rayleigh waves. This research may have important applications in sensitive Rayleigh wave detection, nondestructive testing, energy harvesting of surface waves and other Rayleigh wave related techniques. Agency for Science, Technology and Research (A*STAR) The authors are grateful for the financial support from A*STAR Science and Engineering Research Council under AME Individual Research Grant (IRG) 2018 Grant Call (Project No. A1983c0030). 2022-07-29T03:02:31Z 2022-07-29T03:02:31Z 2021 Journal Article Zhou, W. & Fan, Z. (2021). Localization and amplification of Rayleigh waves by topological elastic metasurfaces. Smart Materials and Structures, 30(8), 084001-. https://dx.doi.org/10.1088/1361-665X/ac0b4b 0964-1726 https://hdl.handle.net/10356/160645 10.1088/1361-665X/ac0b4b 2-s2.0-85109429807 8 30 084001 en A1983c0030 Smart Materials and Structures © 2021 IOP Publishing Ltd. All rights reserved. |
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Engineering::Mechanical engineering Topological Metasurface Rayleigh Waves Zhou, Weijian Fan, Zheng Localization and amplification of Rayleigh waves by topological elastic metasurfaces |
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Recently, the concept of metasurface becomes a hot research topic due to its outstanding advantages compared with its bulk counterpart metamaterial, such as low propagation loss, cheap fabrication cost, compact geometrical structure, high integration level, and specifically excellent performance in wavefront manipulation. Instead of designing elastic metasurfaces for wavefront manipulation based on generalized Snell's law that have been widely studied, in this paper we focus on the topological performance of one dimensional elastic metasurface for manipulation of Rayleigh waves. We present two methods to design the topological metasurface, and several kinds of metasurfaces will be studied. We will show the existence of topologically protected interface modes in these topological metasurfaces that can realize energy localization around interfaces in the topological metasurface, and the displacement at the interface can be amplified more than two times than the input Rayleigh waves. This research may have important applications in sensitive Rayleigh wave detection, nondestructive testing, energy harvesting of surface waves and other Rayleigh wave related techniques. |
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School of Mechanical and Aerospace Engineering |
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School of Mechanical and Aerospace Engineering Zhou, Weijian Fan, Zheng |
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Article |
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Zhou, Weijian Fan, Zheng |
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Zhou, Weijian |
title |
Localization and amplification of Rayleigh waves by topological elastic metasurfaces |
title_short |
Localization and amplification of Rayleigh waves by topological elastic metasurfaces |
title_full |
Localization and amplification of Rayleigh waves by topological elastic metasurfaces |
title_fullStr |
Localization and amplification of Rayleigh waves by topological elastic metasurfaces |
title_full_unstemmed |
Localization and amplification of Rayleigh waves by topological elastic metasurfaces |
title_sort |
localization and amplification of rayleigh waves by topological elastic metasurfaces |
publishDate |
2022 |
url |
https://hdl.handle.net/10356/160645 |
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