High-transmission acoustic self-focusing and directional cloaking in a graded perforated metal slab

Abstract A design strategy and its modeling for high-transmission acoustic self-focusing and directional cloaking in a two-dimensional (2D) and an axisymmetric three-dimensional (3D) gradient-index phononic crystal (GRIN-PC) are reported in this paper. A gradient perforated aluminum slab sandwiched...

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Autores principales:	Sheng-Dong Zhao, Yue-Sheng Wang, Chuanzeng Zhang
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/ff2176689fae4a769a6647e031039b3b
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spelling	oai:doaj.org-article:ff2176689fae4a769a6647e031039b3b2021-12-02T12:32:34ZHigh-transmission acoustic self-focusing and directional cloaking in a graded perforated metal slab10.1038/s41598-017-04512-z2045-2322https://doaj.org/article/ff2176689fae4a769a6647e031039b3b2017-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-04512-zhttps://doaj.org/toc/2045-2322Abstract A design strategy and its modeling for high-transmission acoustic self-focusing and directional cloaking in a two-dimensional (2D) and an axisymmetric three-dimensional (3D) gradient-index phononic crystal (GRIN-PC) are reported in this paper. A gradient perforated aluminum slab sandwiched by water is considered. A low-loss directional cloaking device is achieved by controlling the matching coefficient between the slab and the water. The anisotropy coefficient that affects the scattering properties is also introduced. Furthermore, the phase discontinuity for directional cloaking inside and outside the slab is overcome by introducing a non-gradient slab having a lower group velocity behind the GRIN slab as an acoustic delay device. In addition, an axisymmetric 3D directional cloaking structure is obtained by rotating the corresponding 2D structure around the slab axis.Sheng-Dong ZhaoYue-Sheng WangChuanzeng ZhangNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Sheng-Dong Zhao Yue-Sheng Wang Chuanzeng Zhang High-transmission acoustic self-focusing and directional cloaking in a graded perforated metal slab
description	Abstract A design strategy and its modeling for high-transmission acoustic self-focusing and directional cloaking in a two-dimensional (2D) and an axisymmetric three-dimensional (3D) gradient-index phononic crystal (GRIN-PC) are reported in this paper. A gradient perforated aluminum slab sandwiched by water is considered. A low-loss directional cloaking device is achieved by controlling the matching coefficient between the slab and the water. The anisotropy coefficient that affects the scattering properties is also introduced. Furthermore, the phase discontinuity for directional cloaking inside and outside the slab is overcome by introducing a non-gradient slab having a lower group velocity behind the GRIN slab as an acoustic delay device. In addition, an axisymmetric 3D directional cloaking structure is obtained by rotating the corresponding 2D structure around the slab axis.
format	article
author	Sheng-Dong Zhao Yue-Sheng Wang Chuanzeng Zhang
author_facet	Sheng-Dong Zhao Yue-Sheng Wang Chuanzeng Zhang
author_sort	Sheng-Dong Zhao
title	High-transmission acoustic self-focusing and directional cloaking in a graded perforated metal slab
title_short	High-transmission acoustic self-focusing and directional cloaking in a graded perforated metal slab
title_full	High-transmission acoustic self-focusing and directional cloaking in a graded perforated metal slab
title_fullStr	High-transmission acoustic self-focusing and directional cloaking in a graded perforated metal slab
title_full_unstemmed	High-transmission acoustic self-focusing and directional cloaking in a graded perforated metal slab
title_sort	high-transmission acoustic self-focusing and directional cloaking in a graded perforated metal slab
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/ff2176689fae4a769a6647e031039b3b
work_keys_str_mv	AT shengdongzhao hightransmissionacousticselffocusinganddirectionalcloakinginagradedperforatedmetalslab AT yueshengwang hightransmissionacousticselffocusinganddirectionalcloakinginagradedperforatedmetalslab AT chuanzengzhang hightransmissionacousticselffocusinganddirectionalcloakinginagradedperforatedmetalslab
_version_	1718394075967651840

High-transmission acoustic self-focusing and directional cloaking in a graded perforated metal slab

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