A single-phase elastic hyperbolic metamaterial with anisotropic mass density

• DOI: 10.1121/1.4950728
• Publication Date: 2016-07-01T01:56:35Z
• Authors: R. Zhu; Y. Y. Chen; Y. S. Wang; G. K. Hu; G. L. Huang
• Keywords: 02 engineering and technology; 0210 nano-technology

Wave propagation can be manipulated at a deep subwavelength scale through the locally resonant metamaterial that possesses unusual effective material properties. Hyperlens due to metamaterial's anomalous anisotropy lead superior-resolution imaging. In this paper, single-phase elastic with strongly anisotropic mass density has been designed. The proposed utilizes independently adjustable motions of subwavelength-scale microstructures along two principal directions. High in densities obtained by numerical-based medium theory found and even have opposite signs. For practical applications, shunted piezoelectric elements are introduced into microstructure tailor broad frequency range. Finally, validate design, an hyperlens made hyperbolic is longitudinal wave imaging illustrated numerically. many promising applications for high resolution damage nondestructive evaluation structural health monitoring.