Experimental Observation of Nonreciprocal Waves in a Resonant Metamaterial Beam

Abstract

Structures hosting nonreciprocal (one-way) wave propagation are of key interest in signal processing, sensing, and civil infrastructure, yet experimental realization has so far relied on adaptive materials and external stimulation, which require significant power and are not scalable beyond lab prototypes. This work presents an elastic metamaterial that exploits stiffness variations in an array of geometrically phase-shifted resonators to achieve a nonreciprocal tilt of dispersion modes within dynamic modulation regimes. The ability to induce asymmetric vibrational modes in a scalable, energy-efficient manner has direct implications for numerous applications.

Topics & Concepts