Interface transmittance and interface waves in acoustic Willis media

• DOI: 10.3389/fphy.2023.1141129
• Publication Date: 2023-03-16T07:10:16Z
• Authors: Hongfei Qu; Xiaoning Liu; Anfu Zhang
• Keywords: Ion acoustic wave; Acoustic wave equation; Acoustic theory; Physical acoustics

Acoustics Willis media, known as bianisotropic acoustic incorporate additional coupling between pressure and velocity momentum volumetric strain in their constitutive equation. The extra terms have a significant influence on wave behavior. In this paper, the unusual phenomena relevant to interfaces homogeneous media are theoretically studied. We show that offer more flexible control front energy flow when waves transmitted through an interface. Different from traditional fluid, support edge interface waves, for which existence conditions corresponding features systematically investigated. study unveils possibilities manipulating may inspire new functional designs with metamaterials.