Multi-band topological valley modes of flexural waves in micro-perforated phononic plates

Fan, Lei; Chen, Yafeng; Zhu, Jie; Su, Zhongqing

doi:10.1016/j.ijmecsci.2023.108916

International Journal of Mechanical Sciences

2024

DOI: 10.1016/j.ijmecsci.2023.108916

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Multi-band topological valley modes of flexural waves in micro-perforated phononic plates

Lei Fan,

Yafeng Chen,

Jie Zhu

et al.

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2024

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Cited by 8 publications

References 71 publications

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An On‐Chip Second‐Order Elastic Topological Insulator for Demultiplexing Out‐of‐Plane and In‐Plane Corner Modes

Chen,

Fan,

Zhu

et al. 2024

Advanced Science

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Second‐order elastic topological insulators (SETIs) with tightly localized corner states present a promising avenue for manipulating elastic waves in lower dimensions. However, existing SETIs typically support corner states of only a single mode, either out‐of‐plane or in‐plane. In this work, an on‐chip SETI that simultaneously hosts both high‐frequency out‐of‐plane and in‐plane corner states at ≈0.2 MHz is introduced. The presence of these corner states is experimentally validated, and their selective excitation by tuning the excitation frequency is demonstrated. This capability to demultiplex out‐of‐plane and in‐plane corner states positions the SETI as a potential platform for developing multifunctional elastic devices and enhancing the communication capacities of elastic waves. Furthermore, due to its structural simplicity, the SETI can be readily scaled and integrated into on‐chip elastic circuits, making it suitable for applications in micro‐electromechanical systems.

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An On‐Chip Second‐Order Elastic Topological Insulator for Demultiplexing Out‐of‐Plane and In‐Plane Corner Modes

Chen,

Fan,

Zhu

et al. 2024

Advanced Science

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show abstract

Controlled transmission of multiband acoustic waves based on composite resonant cavities

Liang,

Zhang,

Chu

et al. 2024

Appl. Phys. A

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Tunable topological interface states via a parametric system in composite lattices with/without symmetric elements

Cui,

Yang,

Han

et al. 2024

Appl. Math. Mech.-Engl. Ed.

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Multi-band topological valley modes of flexural waves in micro-perforated phononic plates

Cited by 8 publications

References 71 publications

An On‐Chip Second‐Order Elastic Topological Insulator for Demultiplexing Out‐of‐Plane and In‐Plane Corner Modes

An On‐Chip Second‐Order Elastic Topological Insulator for Demultiplexing Out‐of‐Plane and In‐Plane Corner Modes

Controlled transmission of multiband acoustic waves based on composite resonant cavities

Tunable topological interface states via a parametric system in composite lattices with/without symmetric elements

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