New Frontiers in Acoustic and Elastic Metamaterials and Metasurfaces

In the past two decades, the field of acoustic and elastic metamaterials, controlling acoustic waves in fluids and elastic waves in solids by engineered microstructures, has witnessed significant advancements, such as extreme elastic parameters, invisible cloak, non-reciprocal propagation, et al, among the interdisciplinary communities like physics, materials, mechanical engineering, aerospace engineering, artificial intelligence and so on. Metasurfaces are a special kind of planar metamaterials with subwavelength thickness which is able to provide nonlinear wave responses.

This special topic aims to present the latest developments in science and engineering pertaining to acoustic and elastic metamaterials and metasurfaces, focusing on exploring cutting-edge directions such as space-time modulation, non-Hermitian design, topological design, and advanced engineering applications including multi-functional and reconfigurable designs. By featuring the most recent breakthroughs in the field, we aim to provide a platform for researchers to exchange ideas, collaborate, and push the boundaries of this rapidly evolving field.