基于含缺陷声子晶体孔板共振模式的可调局域声场设计

Tunable Localized Acoustic Fields on a Defect Phononic Crystal Plate Based on Resonant Modes

可调控的局域声场在开发新型滤波器、传感器和声操控微器件等方面具有潜在应用前景。文章数值模拟研究了一种二维正方排列含缺陷孔声子晶体孔板表面的局域声场。计算结果表明,选择不同的共振频率可以调控含缺陷声子晶体孔板表面的声场形态。这是因为缺陷孔与周期孔的Fabry-Perot共振频率不一致,导致含缺陷声子晶体孔板表面的耦合场有多种形态。该工作所设计的缺陷态声子晶体孔板,可为声场与微粒的精细相互作用研究提供声学载台。

Tunable localized acoustic fields have potential applications in the development of novel acoustic devices such as new filters,sensors and acoustic manipulation micro-devices.In this paper,tunable localized acoustic fields on a defect phononic crystal plate（PCP） have been numerically investigated.The results showed localized acoustic fields on a defect PCP can be tuned by changing the resonance frequency.It is attributed to the inconsistency of the resonate frequency for the defect hole and the periodic holes in the defect PCP,which induce various coupled fields on the surface of the defect PCP.This designed defect PCP can be used as acoustic holder for the investigation of the interaction between the acoustic field and microparticles.