When Topology Met Phononics: Wave Manipulation on Edges and Interfaces
Stefano Gonella
Civil, Environmental, and Geo- Engineering, University of Minnesota
ABSTRACT: Elastic metamaterials are structural materials that owe their unique wave manipulation capabilities to their complex internal architecture. Topological metamaterials are special metamaterials whose behavior is directly controlled by the topology of their phonon band structure. In this talk, we present two problems in topological phononics that deal with the propagation of waves at edges and interfaces. The first problem regards a class of metamaterials known as topological Maxwell lattices. In the second part of the presentation, we demonstrate the existence of valley-Hall edge states in the in-plane dynamics of honeycomb lattices with bi-valued strut thickness.
