Experimental realization of temporal refraction and reflection in elastic beams.

ABSTRACT: Wave reflection and refraction at a time interface follow different conservation laws compared to conventional scattering at a spatial interface. This study presents the experimental demonstration of refraction and reflection of flexural waves across a temporal boundary in a continuum-based mechanical metabeam, and unveils opportunities that emerge by tailoring temporal scattering phenomena for phononic applications. We observe these phenomena in an elastic beam attached to an array of piezoelectric patches that can vary in time the effective elastic properties of the beam. Frequency conversion and phase conjugation are observed upon a single temporal interface. These results are consistent with the temporal Snell's law and Fresnel equations for temporal interfaces. Further, we illustrate

SUBMITTER: Wang S 

PROVIDER: S-EPMC12568997 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature