中国物理B ›› 2016, Vol. 25 ›› Issue (12): 124302-124302.doi: 10.1088/1674-1056/25/12/124302

• SPECIAL TOPIC—Acoustics • 上一篇    下一篇

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

Chen Cai(蔡琛), Yin Yuan(袁樱), Wei-Wei Kan(阚威威), Jing Yang(杨京), Xin-Ye Zou(邹欣晔)   

  1. 1. Key Laboratory of Modern Acoustics, MOE, and Institute of Acoustics, Department of Physics, Nanjing University, Nanjing 210093, China;
    2. The School of Mathematics and Physics, Jiangsu University of Technology, Changzhou 213001, China;
    3. School of Science, Nanjing University of Science and Technology, Nanjing 210094, China
  • 收稿日期:2016-04-29 修回日期:2016-06-23 出版日期:2016-12-05 发布日期:2016-12-05
  • 通讯作者: Xin-Ye Zou E-mail:xyzou@nju.edu.cn
  • 基金资助:

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

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

Chen Cai(蔡琛)1, Yin Yuan(袁樱)2, Wei-Wei Kan(阚威威)3, Jing Yang(杨京)1, Xin-Ye Zou(邹欣晔)1   

  1. 1. Key Laboratory of Modern Acoustics, MOE, and Institute of Acoustics, Department of Physics, Nanjing University, Nanjing 210093, China;
    2. The School of Mathematics and Physics, Jiangsu University of Technology, Changzhou 213001, China;
    3. School of Science, Nanjing University of Science and Technology, Nanjing 210094, China
  • Received:2016-04-29 Revised:2016-06-23 Online:2016-12-05 Published:2016-12-05
  • Contact: Xin-Ye Zou E-mail:xyzou@nju.edu.cn
  • Supported by:

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

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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.

关键词: metamaterials, acoustic cloaking, scattering, invisibility

Abstract:

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.

Key words: metamaterials, acoustic cloaking, scattering, invisibility

中图分类号:  (General linear acoustics)

  • 43.20.-f
43.35.+d (Ultrasonics, quantum acoustics, and physical effects of sound) 62.90.+k (Other topics in mechanical and acoustical properties of condensed matter)