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|Title:||Robust large-area elastic transverse wave transport in active acoustic metamaterials||Authors:||Chen, Zhenyu
Lim, C. W.
|Keywords:||Engineering::Civil engineering||Issue Date:||2022||Source:||Chen, Z., Wang, X., Lim, C. W. & Shi, F. (2022). Robust large-area elastic transverse wave transport in active acoustic metamaterials. Journal of Applied Physics, 131(18), 185112-. https://dx.doi.org/10.1063/5.0087988||Journal:||Journal of Applied Physics||Abstract:||We investigate robust large-area elastic transverse wave propagation in an actively tunable membrane-type acoustic metamaterial. The waveguide with multiple degrees of freedom to control the width of the interface mode is realized by designing a heterostructure including three domains. One central domain is constructed by periodic unit cells in an ordinary state, where a Dirac cone can be observed in the band structure. The other two domains consist of periodic unit cells possessing opposite valley Chern numbers, respectively. By employing a finite element model, the topologically protected interface states with tunable degrees of freedom are exhibited. The energy of interface states distributes equally in the large-central region. Although a larger degree of freedom leads to lower amplitudes of interface states, larger total energy is demonstrated by defining a quality factor. Moreover, we design several waveguides with straight lines and sharp corners with different angles and denote three different notations to show clearly that the large-area transverse wave can propagate robustly through sharp corners. Finally, it is found that the large-area transverse wave transport shows immunity to disorders and defects in the propagation path.||URI:||https://hdl.handle.net/10356/161244||ISSN:||0021-8979||DOI:||10.1063/5.0087988||Schools:||School of Civil and Environmental Engineering||Rights:||© 2022 Author(s). All rights reserved. This paper was published by AIP Publishing in Journal of Applied Physics and is made available with permission of Author(s).||Fulltext Permission:||open||Fulltext Availability:||With Fulltext|
|Appears in Collections:||CEE Journal Articles|
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