Compact acoustic metamaterial based on the 3D Mie resonance of a maze ball with an octahedral structure
Compact acoustic metamaterial based on the 3D Mie resonance of a maze ball with an octahedral structure
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基于八面体结构迷宫球 3D 米氏共振的紧凑声学超材料
DOI：
10.1063/5.0084030
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发表时间：
2022-04
影响因子：
4
通讯作者：
Oliver B Wright
中科院分区：
文献类型：
--
作者：
Zhang Ting;Eun Bok;Motonobu Tomoda;Osamu Matsuda;Guo Jianzhong;Liu Xiaojun;Oliver B Wright
声学超材料（AM）为操纵声波提供了不断扩大的可能性。潜在的应用包括诊断医学成像、超吸收、声传感和声隐身。尽管最近取得了进展，但对具有三维（3D）响应的AM的研究仍然落后，特别是对于那些表现出各向同性响应的AM。在这里，我们展示了一个高度紧凑的亚波长迷宫般的多壳塑料球，它产生米氏共振与各向同性单极和各向异性偶极子，四极和八极模式在低频的空气中的声音，基于八面体结构。本征模分析表明，拟议的迷宫球表现出负的体积模量在无粘性损失的情况下，在Mie共振频率，这是一个强大的传输阻塞的签名。在直径为0.17 λ和体积填充因子为13.5%的情况下，构造的单个3D迷宫球将实验测量的透射声能减少了67%，主要受粘性损失的限制。通过优化制造，所提出的3D Mie谐振器应该提供用于在亚波长尺度上操纵声波的通用方法，并导致实现实用的3D超材料器件。
Acoustic metamaterials (AMs) offer ever-expanding possibilities for manipulating sound waves. Potential applications include diagnostic medical imaging, super-absorption, acoustic sensing, and acoustic stealth. In spite of recent progress, the investigation of AMs with a three-dimensional (3D) response is lagging behind, in particular for those that exhibit an isotropic response. Here, we demonstrate a highly compact subwavelength maze-like multi-shell plastic sphere, which generates Mie resonances with isotropic monopolar and anisotropic dipole, quadrupole, and octupole modes at low frequencies for airborne sound, based on an octahedral structure. Eigenmode analysis shows that the proposed maze ball exhibits a negative bulk modulus at the monopole Mie resonance frequency in the absence of viscous losses, which is a signature of strong transmission blocking. With a diameter of 0.17 λ and a volume filling factor of 13.5%, a constructed single 3D maze ball reduces the experimentally-measured transmitted acoustic energy by 67%, limited mainly by viscous losses. With optimized fabrication, the proposed 3D Mie resonator should provide a versatile approach for the manipulation of sound waves on a subwavelength scale, and lead to the realization of practical 3D metamaterial devices.
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DOI：
--
发表时间：
2016
期刊：
Applied Physical Letter
影响因子：
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作者：
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通讯作者：
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