Active Control Topological Valley Modes in Metamaterial Plates

Phononic crystals and metamaterials have a unique band structure that allows for the existence of topologically protected surface states. The topologically protected edge states can guide elastic waves without significant scattering or loss of energy. One of the most promising applications of topolo...

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Bibliographic Details
Published in:Crystals (Basel) 2023-06, Vol.13 (6), p.933
Main Authors: Zhou, Jingxuan, Zhang, Jie, Chang, Jiahui, Li, Zheng-Yang, Yan, Dongjia
Format: Article
Language:English
Subjects:
Acoustic insulation
Acoustic waves
Acoustics
Active control
Algebraic topology
band structure
Base plates
Composite materials
Condensed matter physics
Crystals
Design
Design and construction
Edge waves
Efficiency
Elastic waves
Electromagnetism
Energy
Materials
Materials research
metamaterial
Metamaterials
Methods
Parameter robustness
Phase transitions
Physics
piezoelectric
Piezoelectricity
Propagation
Robust control
Structure
Symmetry
topological acoustic
Topological insulators
Topology
Waveguides
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Summary:Phononic crystals and metamaterials have a unique band structure that allows for the existence of topologically protected surface states. The topologically protected edge states can guide elastic waves without significant scattering or loss of energy. One of the most promising applications of topological insulators in wave guiding is in the field of acoustics, where they can be used to design highly efficient and robust acoustic wave guides. However, the high efficiency, precision, reconfigurability, and robustness of elastic waves remains challenging. The topological insulators provide a feasible method to design high-efficiency, robust, and low-backscattering waveguides. In this work, a novel design of hexagonal metamaterial plates composed of a base plate and piezoelectric patches is proposed. The hexagonal metamaterial plate can generate robust topologically protected edge waves via active control. The paths of the topologically protected edge waves can be tuned by adjusting the control parameters. The robustness and efficiency of the proposed hexagonal metamaterial plate are testified to by the numerical examples. These findings provide systematic theoretical guidelines for designing reconfigurable wave guides, elastic wave splitters, and novel elastic wave devices and hold great promise for the development of high-performance and versatile wave guide technologies with potential applications in a wide range of fields.
ISSN:2073-4352
2073-4352
DOI:10.3390/cryst13060933