Non-closed acoustic cloaking devices enabled by sequential-step linear coordinate transformations

Abstract Hitherto acoustic cloaking devices, which conceal objects externally, depend on objects' characteristics. Despite previous works, we design cloaking devices placed adjacent to an arbitrary object and make it invisible without the need to make it enclosed. Applying sequential linear coo...

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Autores principales:	Zahra Basiri, Mohammad Hosein Fakheri, Ali Abdolali, Chen Shen
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/7697e6b147d54ee088c2e3b5b9106cf8
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spelling	oai:doaj.org-article:7697e6b147d54ee088c2e3b5b9106cf82021-12-02T14:07:47ZNon-closed acoustic cloaking devices enabled by sequential-step linear coordinate transformations10.1038/s41598-021-81331-32045-2322https://doaj.org/article/7697e6b147d54ee088c2e3b5b9106cf82021-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-81331-3https://doaj.org/toc/2045-2322Abstract Hitherto acoustic cloaking devices, which conceal objects externally, depend on objects' characteristics. Despite previous works, we design cloaking devices placed adjacent to an arbitrary object and make it invisible without the need to make it enclosed. Applying sequential linear coordinate transformations leads to a non-closed acoustic cloak with homogeneous materials, creating an open invisible region. Firstly, we propose to design a non-closed carpet cloak to conceal objects on a reflecting plane. Numerical simulations verify the cloaking effect, which is completely independent of the geometry and material properties of the hidden object. Moreover, we extend this idea to achieve a directional acoustic cloak with homogeneous materials that can render arbitrary objects in free space invisible to incident radiation. To demonstrate the feasibility of the realization, a non-resonant meta-atom is utilized which dramatically facilitated the physical realization of our design. Due to the simple acoustic constitutive parameters of the presented structures, this work paves the way toward realization of non-closed acoustic devices, which could find applications in airborne sound manipulation and underwater demands.Zahra BasiriMohammad Hosein FakheriAli AbdolaliChen ShenNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-14 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Zahra Basiri Mohammad Hosein Fakheri Ali Abdolali Chen Shen Non-closed acoustic cloaking devices enabled by sequential-step linear coordinate transformations
description	Abstract Hitherto acoustic cloaking devices, which conceal objects externally, depend on objects' characteristics. Despite previous works, we design cloaking devices placed adjacent to an arbitrary object and make it invisible without the need to make it enclosed. Applying sequential linear coordinate transformations leads to a non-closed acoustic cloak with homogeneous materials, creating an open invisible region. Firstly, we propose to design a non-closed carpet cloak to conceal objects on a reflecting plane. Numerical simulations verify the cloaking effect, which is completely independent of the geometry and material properties of the hidden object. Moreover, we extend this idea to achieve a directional acoustic cloak with homogeneous materials that can render arbitrary objects in free space invisible to incident radiation. To demonstrate the feasibility of the realization, a non-resonant meta-atom is utilized which dramatically facilitated the physical realization of our design. Due to the simple acoustic constitutive parameters of the presented structures, this work paves the way toward realization of non-closed acoustic devices, which could find applications in airborne sound manipulation and underwater demands.
format	article
author	Zahra Basiri Mohammad Hosein Fakheri Ali Abdolali Chen Shen
author_facet	Zahra Basiri Mohammad Hosein Fakheri Ali Abdolali Chen Shen
author_sort	Zahra Basiri
title	Non-closed acoustic cloaking devices enabled by sequential-step linear coordinate transformations
title_short	Non-closed acoustic cloaking devices enabled by sequential-step linear coordinate transformations
title_full	Non-closed acoustic cloaking devices enabled by sequential-step linear coordinate transformations
title_fullStr	Non-closed acoustic cloaking devices enabled by sequential-step linear coordinate transformations
title_full_unstemmed	Non-closed acoustic cloaking devices enabled by sequential-step linear coordinate transformations
title_sort	non-closed acoustic cloaking devices enabled by sequential-step linear coordinate transformations
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/7697e6b147d54ee088c2e3b5b9106cf8
work_keys_str_mv	AT zahrabasiri nonclosedacousticcloakingdevicesenabledbysequentialsteplinearcoordinatetransformations AT mohammadhoseinfakheri nonclosedacousticcloakingdevicesenabledbysequentialsteplinearcoordinatetransformations AT aliabdolali nonclosedacousticcloakingdevicesenabledbysequentialsteplinearcoordinatetransformations AT chenshen nonclosedacousticcloakingdevicesenabledbysequentialsteplinearcoordinatetransformations
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Non-closed acoustic cloaking devices enabled by sequential-step linear coordinate transformations

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