Band transition and topological interface modes in 1D elastic phononic crystals

Abstract In this report, we design a one-dimensional elastic phononic crystal (PC) comprised of an Aluminum beam with periodically arranged cross-sections to study the inversion of bulk bands due to the change of topological phases. As the geometric parameters of the unit cell varies, the second bul...

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Autores principales:	Jianfei Yin, Massimo Ruzzene, Jihong Wen, Dianlong Yu, Li Cai, Linfeng Yue
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/3dcf32a0c6ec4339989bc75f0a38e2c3
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id	oai:doaj.org-article:3dcf32a0c6ec4339989bc75f0a38e2c3
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spelling	oai:doaj.org-article:3dcf32a0c6ec4339989bc75f0a38e2c32021-12-02T12:32:21ZBand transition and topological interface modes in 1D elastic phononic crystals10.1038/s41598-018-24952-52045-2322https://doaj.org/article/3dcf32a0c6ec4339989bc75f0a38e2c32018-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-24952-5https://doaj.org/toc/2045-2322Abstract In this report, we design a one-dimensional elastic phononic crystal (PC) comprised of an Aluminum beam with periodically arranged cross-sections to study the inversion of bulk bands due to the change of topological phases. As the geometric parameters of the unit cell varies, the second bulk band closes and reopens forming a topological transition point. This phenomenon is confirmed for both longitudinal waves and bending waves. By constructing a structural system formed by two PCs with different topological phases, for the first time, we experimentally demonstrate the existence of interface mode within the bulk band gap as a result of topological transition for both longitudinal and bending modes in elastic systems, although for bending modes, additional conditions have to be met in order to have the interface mode due to the dispersive nature of the bending waves in uniform media compared to the longitudinal waves.Jianfei YinMassimo RuzzeneJihong WenDianlong YuLi CaiLinfeng YueNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-10 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Jianfei Yin Massimo Ruzzene Jihong Wen Dianlong Yu Li Cai Linfeng Yue Band transition and topological interface modes in 1D elastic phononic crystals
description	Abstract In this report, we design a one-dimensional elastic phononic crystal (PC) comprised of an Aluminum beam with periodically arranged cross-sections to study the inversion of bulk bands due to the change of topological phases. As the geometric parameters of the unit cell varies, the second bulk band closes and reopens forming a topological transition point. This phenomenon is confirmed for both longitudinal waves and bending waves. By constructing a structural system formed by two PCs with different topological phases, for the first time, we experimentally demonstrate the existence of interface mode within the bulk band gap as a result of topological transition for both longitudinal and bending modes in elastic systems, although for bending modes, additional conditions have to be met in order to have the interface mode due to the dispersive nature of the bending waves in uniform media compared to the longitudinal waves.
format	article
author	Jianfei Yin Massimo Ruzzene Jihong Wen Dianlong Yu Li Cai Linfeng Yue
author_facet	Jianfei Yin Massimo Ruzzene Jihong Wen Dianlong Yu Li Cai Linfeng Yue
author_sort	Jianfei Yin
title	Band transition and topological interface modes in 1D elastic phononic crystals
title_short	Band transition and topological interface modes in 1D elastic phononic crystals
title_full	Band transition and topological interface modes in 1D elastic phononic crystals
title_fullStr	Band transition and topological interface modes in 1D elastic phononic crystals
title_full_unstemmed	Band transition and topological interface modes in 1D elastic phononic crystals
title_sort	band transition and topological interface modes in 1d elastic phononic crystals
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/3dcf32a0c6ec4339989bc75f0a38e2c3
work_keys_str_mv	AT jianfeiyin bandtransitionandtopologicalinterfacemodesin1delasticphononiccrystals AT massimoruzzene bandtransitionandtopologicalinterfacemodesin1delasticphononiccrystals AT jihongwen bandtransitionandtopologicalinterfacemodesin1delasticphononiccrystals AT dianlongyu bandtransitionandtopologicalinterfacemodesin1delasticphononiccrystals AT licai bandtransitionandtopologicalinterfacemodesin1delasticphononiccrystals AT linfengyue bandtransitionandtopologicalinterfacemodesin1delasticphononiccrystals
_version_	1718394090148593664

Band transition and topological interface modes in 1D elastic phononic crystals

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