Acoustic/elastic metasurfaces as a kind of two-dimensional metamaterials are of
subwavelength thickness and show remarkable ability of acoustic/elastic wave …

Metamaterials (MMs), which include phononic crystals (PCs) as a particular type, exhibit
anomalous wave propagation properties through artificial design of topologies or lattice …

The design of acoustic metasurfaces with desirable properties is challenging due to their
artificial nature and the large space of physical and geometrical parameters. Until recently …

Willis coupling, in context of acoustics or elasticity designating the coupling between the
strain and momentum, have been garnering significant attentions in recent years. As …

In this paper, analytical solutions for shear horizontal (SH) waves propagating in a
piezoelectric (PE) substrate with periodic gradient mass oscillators are obtained. Both wave …

Lorentz reciprocity places important constraints on the response of systems to wave
excitations, and surpassing these constraints is of both fundamental and applied interest. In …

Acoustics recently became a versatile platform for discovering novel physical effects and
concepts at a relatively simple technological level. In this way, single resonators and the …

This paper presents a spatial dispersive Willis dynamic homogenization method for acoustic
metamaterials based on multiple scattering theory, which is valid for each physical …

Acoustic metamaterials and metasurfaces often present complex geometries and
microstructures. The development of models of reduced complexity is fundamental to …

Willis materials provide degrees of freedom to control mechanical waves unavailable in
conventional materials, but our understanding of wave-matter interaction in these exotic …