Broadband wide-width acoustic topological waveguides with intermittent coupling

IF 7.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Mechanical Sciences Pub Date : 2025-07-10 DOI:10.1016/j.ijmecsci.2025.110591

Shiqi Tong , Jiawen Xu , Dawei Xia , Hui Wang , Geng Chen , Ruqiang Yan , Aiguo Song

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Abstract

Acoustic topological insulators (ATIs) are of great use in the reliable information transmission and processing owing to their exceptional wave modulation characteristics, such as effective backscatter suppression and defect immunity. However, energy in a topological waveguide is typically confined to a narrow region, restricting its potential for efficient energy transmission and integration with bulk devices. Moreover, the existing ATI-based waveguides with adjustable widths have narrow operating bands. Here, an acoustic topological heterostructure is proposed, supporting topological waveguides with broad bandwidths and adjustable mode widths. This heterostructure realizes intermittent coupling waveguides by alternately arranging phononic crystals with different topological properties. It not only possesses the inherent excellent robustness of topological states, but also resolves the previous trade-off between mode width and operational bandwidth. The developed heterostructure offers a pathway for designing broadband topology devices for large-scale acoustic transmission, and its mode width freedom is conducive to integration into the acoustic system. This work provides new insights into various practical applications of ATIs in multifunctional information processing, computing, and communications.

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间歇耦合的宽带宽频宽声学拓扑波导

声学拓扑绝缘体由于其优异的波调制特性，如有效的反向散射抑制和缺陷免疫，在可靠的信息传输和处理中有着重要的应用。然而，拓扑波导中的能量通常局限于一个狭窄的区域，限制了其高效能量传输和与大块器件集成的潜力。此外，现有的基于ati的波导宽度可调，工作频带较窄。在此，提出了一种声学拓扑异质结构，支持具有宽带和可调模式宽度的拓扑波导。这种异质结构通过交替排列具有不同拓扑性质的声子晶体来实现波导的间歇性耦合。它不仅具有拓扑状态固有的优异鲁棒性，而且解决了以往模式宽度和工作带宽之间的权衡问题。所开发的异质结构为设计用于大规模声传输的宽带拓扑器件提供了途径，其模宽自由有利于集成到声学系统中。这项工作为ATIs在多功能信息处理、计算和通信方面的各种实际应用提供了新的见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Mechanical Sciences 工程技术-工程：机械

CiteScore

12.80

自引率

17.80%

发文量

769

审稿时长

19 days

期刊介绍： The International Journal of Mechanical Sciences (IJMS) serves as a global platform for the publication and dissemination of original research that contributes to a deeper scientific understanding of the fundamental disciplines within mechanical, civil, and material engineering. The primary focus of IJMS is to showcase innovative and ground-breaking work that utilizes analytical and computational modeling techniques, such as Finite Element Method (FEM), Boundary Element Method (BEM), and mesh-free methods, among others. These modeling methods are applied to diverse fields including rigid-body mechanics (e.g., dynamics, vibration, stability), structural mechanics, metal forming, advanced materials (e.g., metals, composites, cellular, smart) behavior and applications, impact mechanics, strain localization, and other nonlinear effects (e.g., large deflections, plasticity, fracture). Additionally, IJMS covers the realms of fluid mechanics (both external and internal flows), tribology, thermodynamics, and materials processing. These subjects collectively form the core of the journal's content. In summary, IJMS provides a prestigious platform for researchers to present their original contributions, shedding light on analytical and computational modeling methods in various areas of mechanical engineering, as well as exploring the behavior and application of advanced materials, fluid mechanics, thermodynamics, and materials processing.