AI 中文总结
该研究针对弹性波能量传输瓶颈，提出基于量子谷霍尔效应的全极化弹性拓扑异质结构，实现全极化分量耦合传输，能量采集效率较传统结构提升约4.79倍，为拓扑超材料能量采集应用提供新方案。
AI 中文摘要
为解决拓扑超材料中弹性波能量仅能通过窄路径波导传输的挑战，大面积波导的提出有效突破了该技术瓶颈。然而，弹性波是具有复杂多分量传输特性的矢量波，实现面内与面外全极化分量的协同传输对弹性波能量传输及捕获应用构成重大挑战。为解决上述问题，本文提出一种基于量子谷霍尔效应的全极化弹性拓扑异质结构。首先，设计对称晶胞结构以获得具有不同拓扑特性的面内与面外模式晶胞，并制备多种超晶胞结构，实现面内与面外分量全极化弹性波能量的同时传输。此外，利用大面积波导态设计梯度谷锁定结构以约束并汇聚传输能量，分析其能量采集性能。结果表明，所提结构可实现全极化弹性波分量的耦合传输；梯度谷锁定声子晶体板的能量采集能力约为传统单分量传输结构的4.79倍，大幅提升了声能采集的效率与传输稳定性。本研究为拓扑超材料在能量采集领域的工程应用提供了新见解。
英文摘要
To address the challenge that elastic wave energy can only transmit through narrow path waveguides in topological metamaterials, the proposal of large area waveguides effectively breaks through this technical bottleneck. Nevertheless, elastic waves are vector waves with complex multi component transmission characteristics. Realizing the cooperative transmission of in plane and out of plane fully polarized components poses substantial challenges for elastic wave energy transmission and trapping applications. To tackle the above mentioned problems, this paper proposes a fully polarized elastic topological heterostructure based on the quantum valley Hall effect. First, symmetric unit cell structures are designed to obtain unit cells with distinct topological properties for in plane and out of plane modes, and multiple types of supercell structures are fabricated to realize the simultaneous transmission of fully polarized elastic wave energy for both in plane and out of plane components. Furthermore, a gradient valley locked structure is designed using large area waveguide states to constrain and converge the transmitted energy, and its energy harvesting performance is analyzed. The results demonstrate that the proposed structure enables coupled transmission of fully polarized elastic wave components. Moreover, the energy harvesting capability of the gradient valley locked phononic crystal plate is approximately 4.79 times that of conventional single component transmission structures, which greatly improves the efficiency and transmission stability of acoustic energy harvesting. This work provides new insights for the engineering application of topological metamaterials in the field of energy harvesting.
