Acoustic carpet invisibility cloak with two open windows using multilayered homogeneous isotropic material

doi:10.1088/1674-1056/20/11/114301

Abstract We present a method for designing an open acoustic cloak that can conceal a perturbation on flat ground and simultaneously meet the requirement of communication and matter interchange between the inside and the outside of the cloak. This cloak can be constructed with a multilayered structure and each layer is an isotropic and homogeneous medium. The design scheme consists of two steps: firstly, we apply a conformal coordinate transformation to obtain a quasi-perfect cloak with heterogeneous isotropic material; then, according to the profile of the material distribution, we degenerate this cloak into a multilayered-homogeneous isotropic cloak, which has two open windows with negligible disturbance on its invisibility performance. This may greatly facilitate the fabrication and enhance the applicability of such a carpet-type cloak.

Keywords: transformation method acoustic wave carpet cloak multilayered structure

Received: 23 February 2011
Revised: 06 May 2011
Accepted manuscript online:

PACS:	43.20.+g	(General linear acoustics)
	43.20.Fn	(Scattering of acoustic waves)

Cite this article:

Ren Chun-Yu(任春雨), Xiang Zhi-Hai(向志海), and Cen Zhang-Zhi(岑章志) Acoustic carpet invisibility cloak with two open windows using multilayered homogeneous isotropic material 2011 Chin. Phys. B 20 114301

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Acoustic carpet invisibility cloak with two open windows using multilayered homogeneous isotropic material

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