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

作　　者：任春雨 向志海 岑章志 

机构地区：[1]Applied Mechanics Laboratory,Department of Engineering Mechanics,Tsinghua University [2]Department of Naval Architecture and Ocean Engineering,Naval University of Engineering

出　　处：《Chinese Physics B》2011年第11期353-358,共6页中国物理B（英文版）

摘　　要：We present a method for designing an open acoustic cloak that can conceal a perturbation on Hat ground aria 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.We present a method for designing an open acoustic cloak that can conceal a perturbation on Hat ground aria 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.

关 键 词：transformation method acoustic wave carpet cloak multilayered structure 

分 类 号：O429[理学—声学]