Unidirectional propagation of designer surface acoustic waves

TL;DR

This paper presents a novel design for unidirectional surface acoustic waves using a corrugated rigid plate with asymmetric slits, validated by simulations and experiments, with potential applications in compact acoustic circuits.

Contribution

It introduces a new design method for unidirectional surface acoustic waves based on interference from asymmetric slits, validated through theoretical, simulation, and experimental approaches.

Findings

Successful generation of unidirectional surface acoustic waves.

Validation of design through simulations and experiments.

Potential for integration into compact acoustic devices.

Abstract

We propose an efficient design route to generate unidirectional propagation of the designer surface acoustic waves. The whole system consists of a periodically corrugated rigid plate combining with a pair of asymmetric narrow slits. The directionality of the structure-induced surface waves stems from the destructive interference between the evanescent waves emitted from the double slits. The theoretical prediction is validated well by simulations and experiments. Promising applications can be anticipated, such as in designing compact acoustic circuits.