A single-layered elastic metasurface for switching wide-angle asymmetric transmission of flexural waves
Source abstract
Abstract
A limitation of present elastic metasurfaces remains in their modest flexibility to meet convertible functions on demand. Here, a feasible single-layered lossless metasurface is theoretically proposed and experimentally demonstrated for adjusting the asymmetric transmission of flexural waves. The easily reconstructed unit is derived from multiple pillared resonators; then, the number of units per period can be changed depending on the desired integer parity. In addition, the asymmetric transmission is physically realized by the uneven diffraction of the ±1st orders in opposite fields of the designed metasurface. Requiring neither active modules nor passively multilayer or loss-induced strategies, our design using only a layer of lossless metasurface allows the elastic-wave behavior to switch between efficient symmetric and asymmetric transmissions. Furthermore, a high contrast ratio of transmitted energy is verified in experiments and simulations within a wide-angle range. The present work is connected with the pragmatic applications of metasurfaces in timely directional vibration control and compactly elastodynamic rectifications.
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Research context
OpenAlex topics: Acoustic Wave Phenomena Research · Metamaterials and Metasurfaces Applications · Innovative Energy Harvesting Technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures, Shijiazhuang Tiedao University 1 , Shijiazhuang 050043, China
Department of Engineering Mechanics, Shijiazhuang Tiedao University 2 , Shijiazhuang 050043, China
Department of Mechanics, School of Mechanical Engineering, Tianjin University 3 , Tianjin 300350, China
Institute of Engineering Mechanics, Beijing Jiaotong University 4 , Beijing 100044, China
Funding
National Natural Science Foundation of China · Natural Science Foundation of Hebei Province · Hebei Provincial Department of Human Resources and Social Security · National College Students Innovation and Entrepreneurship Training Program
References (39)
Show source-provided references
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