论文标题

通过手性分层超材料量身定制的拓扑边缘波

Tailored Topological Edge Waves via Chiral Hierarchical Metamaterials

论文作者

De Ponti, Jacopo M., Iorio, Luca, Chaplain, Gregory J., Corigliano, Alberto, Craster, Richard V., Ardito, Raffaele

论文摘要

精确操纵振动波能的方向和纠正是波物理和工程的关键需求。我们考虑了有限框架的结构的范式,以及将能量从关键区域引导,使它们无振动,并沿着边缘重定向能量,以减速或能量收集。我们设计了一个示例框架的超材料,结合了波浪物理的两个不同区域。首先,拓扑边缘状态采用非常规的四门病晶格。我们通过添加微谐音器来控制这些高度局部的受保护边缘状态,从而利用了尺度的层次结构,从而施加可调的对称性破坏和可重新配置的质量。这使我们能够在宏观框架晶格中实现精确的位置控制,从而开放了可靠的信号传输和振动控制的机会。实验,理论,仿真都用于提供物理学的全面分析和解释。

Precise manipulation of the direction and re-direction of vibrational wave energy is a key demand in wave physics and engineering. We consider the paradigm of a finite frame-like structure and the requirement to channel energy away from critical regions, leaving them vibration-free, and redirect energy along edges towards energy concentrators for damping or energy harvesting. We design an exemplar frame metamaterial, combining two distinct areas of wave physics. Firstly, topological edge states taking an unconventional tetrachiral lattice. We control these highly localised protected edge states leveraging a hierarchy of scales through the addition of micro-resonators that impose tuneable symmetry breaking and reconfigurable mass. This allows us to achieve precise positional control in the macro-scale frame lattice, thereby opening opportunities for robust signal transport and vibration control. Experiments, theory, simulation are all utilised to provide a comprehensive analysis and interpretation of the physics.

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