Molding acoustic, electromagnetic and water waves with a single cloak
Type
ArticleAuthors
Xu, JunJiang, Xu
Fang, Nicholas
Georget, Elodie
Abdeddaim, Redha
Geffrin, Jean Michel
Farhat, Mohamed
Sabouroux, Pierre
Enoch, Stefan
Guenneau, Sébastien
KAUST Department
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) DivisionElectrical Engineering Program
Date
2015-06-09Online Publication Date
2015-06-09Print Publication Date
2015-09Permanent link to this record
http://hdl.handle.net/10754/564186
Metadata
Show full item recordAbstract
We describe two experiments demonstrating that a cylindrical cloak formerly introduced for linear surface liquid waves works equally well for sound and electromagnetic waves. This structured cloak behaves like an acoustic cloak with an effective anisotropic density and an electromagnetic cloak with an effective anisotropic permittivity, respectively. Measured forward scattering for pressure and magnetic fields are in good agreement and provide first evidence of broadband cloaking. Microwave experiments and 3D electromagnetic wave simulations further confirm reduced forward and backscattering when a rectangular metallic obstacle is surrounded by the structured cloak for cloaking frequencies between 2.6 and 7.0 GHz. This suggests, as supported by 2D finite element simulations, sound waves are cloaked between 3 and 8 KHz and linear surface liquid waves between 5 and 16 Hz. Moreover, microwave experiments show the field is reduced by 10 to 30 dB inside the invisibility region, which suggests the multi-wave cloak could be used as a protection against water, sonic or microwaves. © 2015, Nature Publishing Group. All rights reserved.Citation
Xu, J., Jiang, X., Fang, N., Georget, E., Abdeddaim, R., Geffrin, J.-M., … Guenneau, S. (2015). Molding acoustic, electromagnetic and water waves with a single cloak. Scientific Reports, 5(1). doi:10.1038/srep10678Publisher
Springer NatureJournal
Scientific ReportsPubMed ID
26057934Additional Links
https://www.nature.com/articles/srep10678.pdfae974a485f413a2113503eed53cd6c53
10.1038/srep10678
Scopus Count
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