耦合膜腔超表面上的低频声表面波

IF 3.7 2区物理与天体物理 Q1 Physics and Astronomy

Physical Review B Pub Date : 2025-04-21 DOI:10.1103/physrevb.111.155427

D. B. Moore, J. D. Smith, J. R. Sambles, A. P. Hibbins, T. A. Starkey

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引用次数: 0

摘要

我们实验研究了一组耦合膜顶腔支持的局部声表面波的色散。我们设计、模拟并表征了一个超表面，该超表面由一个简单的圆柱形充气腔谐振器组成，顶部有一个张紧膜。我们表明，通过调整组成膜或腔的共振，耦合系统的行为可以使最低支撑表面模式的频率比没有膜的腔减少一半。实验结果与数值预测结果进行了比较。利用这一机制，通过改变组成元件的物理参数来调节耦合腔膜系统的谐振频率，可以很容易地改变声表面模式的工作频率。2025年由美国物理学会出版

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Low-frequency acoustic surface waves on a coupled membrane-cavity metasurface

We experimentally study the dispersion of localized acoustic surface waves (ASWs) supported by an array of coupled membrane-capped cavities. We design, simulate, and characterize a metasurface with a unit cell comprising a simple cylindrical air-filled cavity resonator topped with a tensioned membrane. We show that by tuning the resonance of constituent membrane or cavity, the behavior of the coupled system can reduce the frequency of the lowest supported surface mode by half compared to cavities without membranes. Experimentally obtained dispersion of the ASWs supported by the sample are compared with numerical predictions. With this mechanism, the operating frequency of acoustic surface modes can readily be altered by changing the physical parameters of constituent elements to tune the resonant frequency of the coupled cavity-membrane system.

Published by the American Physical Society

2025

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来源期刊

Physical Review B 物理-物理：凝聚态物理

CiteScore

6.70

自引率

32.40%

发文量

审稿时长

3.0 months

期刊介绍： Physical Review B (PRB) is the world’s largest dedicated physics journal, publishing approximately 100 new, high-quality papers each week. The most highly cited journal in condensed matter physics, PRB provides outstanding depth and breadth of coverage, combined with unrivaled context and background for ongoing research by scientists worldwide. PRB covers the full range of condensed matter, materials physics, and related subfields, including: -Structure and phase transitions -Ferroelectrics and multiferroics -Disordered systems and alloys -Magnetism -Superconductivity -Electronic structure, photonics, and metamaterials -Semiconductors and mesoscopic systems -Surfaces, nanoscience, and two-dimensional materials -Topological states of matter