Experimental Observation of Nonreciprocal Waves in a Resonant Metamaterial Beam
Applied Physics
2020-02-18 v4
Abstract
Space-time-varying materials pledge to deliver nonreciprocal dispersion in linear systems by inducing an artificial momentum bias. Although such a paradigm eliminates the need for actual motion of the medium, experimental realization of space-time structures with dynamically changing material properties has been elusive. In this letter, we present an elastic metamaterial that exploits stiffness variations in an array of geometrically phase-shifted resonators -- rather than external material stimulation -- to induce a temporal modulation. We experimentally demonstrate that the resulting bias breaks time-reversal symmetry in the resonant metamaterial, and achieves a nonreciprocal tilt of dispersion modes within dynamic modulation regimes.
Keywords
Cite
@article{arxiv.1910.08765,
title = {Experimental Observation of Nonreciprocal Waves in a Resonant Metamaterial Beam},
author = {M. A. Attarzadeh and J. Callanan and M. Nouh},
journal= {arXiv preprint arXiv:1910.08765},
year = {2020}
}