Pathway towards Programmable Wave Anisotropy in Cellular Metamaterials

Paolo Celli, Weiting Zhang, Stefano Gonella

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

In this work, we provide a proof-of-concept experimental demonstration of the wave-control capabilities of cellular metamaterials endowed with populations of tunable electromechanical resonators. Each independently tunable resonator comprises a piezoelectric patch and a resistor-inductor shunt, and its resonant frequency can be seamlessly reprogrammed without interfering with the cellular structure's default properties. We show that, by strategically placing the resonators in the lattice domain and by deliberately activating only selected subsets of them, chosen to conform to the directional features of the beamed wave response, it is possible to override the inherent wave anisotropy of the cellular medium. The outcome is the establishment of tunable spatial patterns of energy distillation resulting in a nonsymmetric correction of the wave fields.

Original languageEnglish (US)
Article number014014
JournalPhysical Review Applied
Volume9
Issue number1
DOIs
StatePublished - Jan 12 2018

Bibliographical note

Funding Information:
We acknowledge the support of the National Science Foundation (Grant No.CMMI-1266089). P.C. acknowledges the support of the University of Minnesota through the Doctoral Dissertation Fellowship.

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