Volume 38 Issue 3
Feb 2022
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M. Jiang, H. T. Zhou, X. S. Li, W. X. Fu, Y. F. Wang, and Y. S. Wang,Extreme transmission of elastic metasurface for deep subwavelength focusing. Acta Mech. Sin., 2022, 38, http://www.w3.org/1999/xlink' xlink:href='https://doi.org/10.1007/s10409-021-09073-z'>https://doi.org/10.1007/s10409-021-09073-z
Citation: M. Jiang, H. T. Zhou, X. S. Li, W. X. Fu, Y. F. Wang, and Y. S. Wang,Extreme transmission of elastic metasurface for deep subwavelength focusing. Acta Mech. Sin., 2022, 38, http://www.w3.org/1999/xlink" xlink:href="https://doi.org/10.1007/s10409-021-09073-z">https://doi.org/10.1007/s10409-021-09073-z

Extreme transmission of elastic metasurface for deep subwavelength focusing

doi: 10.1007/s10409-021-09073-z
Funds:

the National Natural Science Foundation of China Grant

Y.-F. Wang also acknowledges support by the Natural Science Foundation of Tianjin 20JCQNJC01030

More Information
  • Corresponding author: Wang Yan-Feng, E-mail address: wangyanfeng@tju.edu.cn (Yan-Feng Wang)
  • Accepted Date: 02 Dec 2021
  • Available Online: 01 Aug 2022
  • Publish Date: 07 Feb 2022
  • Issue Publish Date: 01 Mar 2022
  • In this paper, elastic metasurfaces composed of zigzag units are proposed to manipulate flexural waves at a deep subwavelength scale. Through the parameter optimization of the genetic algorithm, units with full transmission and full phase control can be found, while the width is only one-fifth of the wavelength. The outstanding capability of the units is explained by analyzing their wave fields. The flat and the curved metasurfaces for focusing are designed and simulated, showing excellent performance. Experimental results of the flat metasurface show that the incident wave energy at the focal point is enhanced over 6 times, verifying the simulation results. The proposed metasurfaces could be useful in the design of compact and efficient elastic devices.

     

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