Fluid-like elastic metasurface

被引:6
|
作者
Shin, Ye Jeong [1 ]
Seung, Hong Min [2 ,3 ]
Oh, Joo Hwan [1 ]
机构
[1] Ulsan Natl Inst Sci & Technol, Dept Mech Engn, UNIST Gil 50, Ulsan 44919, South Korea
[2] Korea Res Inst Stand & Sci, Intelligent Wave Engn Team, Daejeon 34113, South Korea
[3] Univ Sci & Technol UST, Dept Precis Measurement, Daejeon 34113, South Korea
基金
新加坡国家研究基金会;
关键词
MODE CONVERSION; METAMATERIALS; WAVES;
D O I
10.1063/5.0139336
中图分类号
O59 [应用物理学];
学科分类号
摘要
What makes elastic waves different from other waves is the existence of various wave modes and coupling between these modes. Accordingly, the manipulation of elastic waves suffers from many limitations due to mode coupling, which is an inherent complex physical property of elastic waves. In this study, we propose fluid-like elastic metasurfaces that act as an acoustic (fluid) surface to perfectly eliminate mode coupling. Because longitudinal and shear waves are decoupled, only reflected longitudinal (or shear) waves exist when longitudinal (or shear) waves are incident. Using a strip-type unit cell, elastic metasurfaces mimicking acoustic hard-wall and soft-wall were designed and realized. In addition, numerical analysis and experiments were conducted to prove the validity of the designed unit cells. This study presents a more versatile metasurface by solving the mode coupling of solid elastic waves. In addition, two types of designed fluid-like metasurfaces are expected to be utilized in further studies considering the opposite phase shift characteristic.
引用
收藏
页数:6
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