Fluid-like elastic metasurface
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 stu...
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| Veröffentlicht in: | Applied physics letters 2023-03, Vol.122 (10) |
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| creator | Shin, Ye Jeong Seung, Hong Min Oh, Joo Hwan |
| description | 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. |
| doi_str_mv | 10.1063/5.0139336 |
| format | Article |
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| ispartof | Applied physics letters, 2023-03, Vol.122 (10) |
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| source | AIP Journals Complete; Alma/SFX Local Collection |
| subjects | Applied physics Coupled modes Coupling Elastic limit Elastic properties Elastic waves Metasurfaces Numerical analysis Shear Unit cell |
| title | Fluid-like elastic metasurface |
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