Enhanced quality factors at resonance in acoustofluidic cavities embedded in matched elastic metamaterials

TL;DR

Embedding liquid-filled acoustofluidic cavities in elastic metamaterials with matched moduli significantly enhances their resonance quality factors, achieving 100 to 1000 times improvement over conventional cavities.

Contribution

This work demonstrates a novel approach to substantially increase acoustic resonance quality factors using elastic metamaterials with tailored properties.

Findings

Quality factors improved by 2 to 3 orders of magnitude.

Matching elastic moduli to liquid properties is key.

Potential for advanced acoustic device applications.

Abstract

We show that by embedding liquid-filled acoustofluidic cavities in a metamaterial, the quality factor of the cavity at selected acoustic resonance modes can be enhanced by 2 to 3 orders of magnitude relative to a comparable conventional cavity by matching the coarse-grained elastic moduli of the metamaterial to the acoustic properties of the liquid.