宽带大规模声学拓扑波导

IF 6.3 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures Pub Date : 2024-10-22 DOI:10.1016/j.compstruct.2024.118669

Yafeng Chen , Xueyun Wen , Yan Lu , Zhihao Lan , Lei Fan , Harold S. Park , Zhongming Gu , Jie Zhu , Zhongqing Su

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引用次数: 0

摘要

声拓扑波导（ATW）承载着拓扑保护波导模式，为实现大规模声音传输和稳健性提供了一个独特的机会。然而，目前普遍采用的 ATW 通常是基于物理直觉的正向设计声波晶体（SC），不可避免地会导致带宽受限。在这里，我们利用具有最大拓扑带隙的反向设计声波晶体，构建了基于量子自旋霍尔效应和量子谷霍尔效应的宽带 ATW。宽带大尺度传输、自旋锁定单向传输以及声波的挤压效应都得到了验证。这项研究为设计具有宽带性能的拓扑器件以实现大规模声波传输开辟了一条新路。

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Broadband large-scale acoustic topological waveguides

The acoustic topological waveguide (ATW) hosting topologically protected waveguide modes provides a unique opportunity for achieving large-scale sound transport with robustness. However, prevailing ATWs are typically designed by forward-designed sonic crystals (SCs) based on physical intuitions, unavoidably leading to restricted bandwidths. Here, using the inverse-designed SCs with maximized topological bandgaps, we construct broadband ATWs based on both the quantum spin Hall effect and the quantum valley Hall effect. Broadband large-scale transportation, spin-locked one-way transportation, and the squeezing effect of acoustic waves are demonstrated. This study ushers a new path for designing topological devices with broadband performance for large-scale acoustic wave transportation.

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来源期刊

Composite Structures 工程技术-材料科学：复合

CiteScore

12.00

自引率

12.70%

发文量

1246

审稿时长

78 days

期刊介绍： The past few decades have seen outstanding advances in the use of composite materials in structural applications. There can be little doubt that, within engineering circles, composites have revolutionised traditional design concepts and made possible an unparalleled range of new and exciting possibilities as viable materials for construction. Composite Structures, an International Journal, disseminates knowledge between users, manufacturers, designers and researchers involved in structures or structural components manufactured using composite materials. The journal publishes papers which contribute to knowledge in the use of composite materials in engineering structures. Papers deal with design, research and development studies, experimental investigations, theoretical analysis and fabrication techniques relevant to the application of composites in load-bearing components for assemblies, ranging from individual components such as plates and shells to complete composite structures.