Ultrabroadband Elastic Cloaking in Thin Plates

Mohamed Farhat, Sebastien Guenneau, and Stefan Enoch
Phys. Rev. Lett. 103, 024301 – Published 10 July 2009
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Abstract

Control of waves with metamaterials is of great topical interest, and is fueled by rapid progress in broadband acoustic and electromagnetic cloaks. We propose a design for a cloak to control bending waves propagating in isotropic heterogeneous thin plates. This is achieved through homogenization of a multilayered concentric coating filled with piecewise constant isotropic elastic material. Significantly, our cloak displays no phase shift for both backward and forward scattering. To foster experimental efforts, we provide a simplified design of the cloak which is shown to work in a more than two-octave frequency range (30 Hz to 150 Hz) when it consists of 10 layers using only 6 different materials overall. This metamaterial should be easy to manufacture, with potential applications ranging from car industry to antiearthquake passive systems for smart buildings, depending upon the plate dimensions and wavelengths.

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  • Received 7 May 2009

DOI:https://doi.org/10.1103/PhysRevLett.103.024301

©2009 American Physical Society

Authors & Affiliations

Mohamed Farhat1, Sebastien Guenneau2, and Stefan Enoch1

  • 1Institut Fresnel, CNRS, Aix-Marseille Université, Campus universitaire de Saint-Jérôme, 13013 Marseille, France
  • 2Department of Mathematical Sciences, Peach Street, Liverpool University, Liverpool L69 3BX, United Kingdom

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Issue

Vol. 103, Iss. 2 — 10 July 2009

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