The paradigm of metamaterials, in which engineered structures are used to control wave propagation and transport, are applicable to a wide range of dynamical systems. First conceived for electromagnetics, the field now finds extremely wide applicability in controlling mechanical wave propagation including acoustic waves in fluids and elastic waves in solids. The past decade of research in these areas has delivered many advances, pushing the field from its origins in phononic crystals, negative refractive index metamaterials, and transformation acoustics to the breadth of topics being pursued at present.
This Special Topic aims to further advance acoustic and elastic metamaterials research across all areas of the field through new theoretical concepts and metamaterial design approaches, new experimental implementations and demonstrations, and new devices and applications. The Special Topic presents an opportunity to demonstrate what can be done with acoustic and elastic metamaterial structures that have already been conceived, as well as outline new concepts that could deliver even more remarkable functionality in the future.
Topics covered include, but are not limited to:
- Topological structures and effects
- Space- and time-modulated metamaterials
- Non-Hermitian acoustic and elastic metamaterials
- Optimized acoustic and elastic structures
- Active, nonlinear and tunable structures
- New devices applications based on acoustic and elastic metamaterials
Steven Cummer , Duke University
Vincent Tournat, Le Mans Université
Chiara Daraio, California Institute of Technology
Jensen Li, The Hong Kong University of Science and Technology