声学Mie共振及其应用

Acoustic Mie resonance and its applications

Mie共振是基于Mie散射理论的共振散射现象,起源于单极、偶极、四极、八极和更高的多极振子所引起的辐射叠加。近年来,人工产生的声学Mie共振得到了越来越多的关注。由于声学Mie共振具有多种共振模式,基于Mie共振的声学超构材料体现出许多独特的声学特性,有望被应用到低频声波强反射、负折射、彩虹俘获、指向性声辐射、超常声波透射等众多领域当中。

Mie resonance, based on Mie scattering, is a phenomenon that is caused by the superposition of monopolar, dipolar, quadrupolar, octupolar and higher multipolar modes of radiation. In recent years, artificial acoustic Mie resonances have received growing attention. Acoustic metamaterials based on the Mie resonance exhibit many unique properties because the resonances have a variety of modes. These materials have been applied to many fields such as low-frequency acoustic reflection, negative refraction, rainbow trapping, directivity, and extraordinary acoustic transmission.