Improving the performance of acoustic invisibility with multilayer structure based on scattering analysis  

作　　者：蔡琛 袁樱 阚威威 杨京 邹欣晔 

机构地区：[1]Key Laboratory of Modern Acoustics,MOE,and Institute of Acoustics,Department of Physics,Nanjing University [2]The School of Mathematics and Physics,Jiangsu University of Technology [3]School of Science,Nanjing University of Science and Technology

出　　处：《Chinese Physics B》2016年第12期9-16,共8页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.11274168,11374157,11174138,11174139,11222442,and 81127901);the National Basic Research Program of China(Grant Nos.2010CB327803 and 2012CB921504)

摘　　要：In this paper, acoustic scattering from the system comprised of a cloaked object and the multilayer cloak with only one single pair of isotropic media is analyzed with a recursive numerical method. The designed acoustic parameters of the isotropic cloak media are assumed to be single-negative, and the resulting cloak can reduce acoustic scattering from an acoustic sensor while allowing it to receive external information. Several factors that may influence the performance of the cloak, including the number of layers and the acoustic dissipation of the medium are fully analyzed. Furthermore, the possibility of achieving acoustic invisibility with positive acoustic parameters is proposed by searching the optimum value in the parameter space and minimizing the scattering cross-section.In this paper, acoustic scattering from the system comprised of a cloaked object and the multilayer cloak with only one single pair of isotropic media is analyzed with a recursive numerical method. The designed acoustic parameters of the isotropic cloak media are assumed to be single-negative, and the resulting cloak can reduce acoustic scattering from an acoustic sensor while allowing it to receive external information. Several factors that may influence the performance of the cloak, including the number of layers and the acoustic dissipation of the medium are fully analyzed. Furthermore, the possibility of achieving acoustic invisibility with positive acoustic parameters is proposed by searching the optimum value in the parameter space and minimizing the scattering cross-section.

关 键 词：METAMATERIALS acoustic cloaking SCATTERING INVISIBILITY 

分 类 号：O422.5[理学—声学] P631.443[理学—物理]