Acoustic guiding and subwavelength imaging with sharp bending by sonic crystal

TL;DR

This paper presents a sonic crystal-based waveguide that achieves sharp 90-degree bending with high transmission efficiency and subwavelength imaging resolution, advancing acoustic wave manipulation techniques.

Contribution

It introduces a simple truncation method for sonic crystals to create all-angle, wide-band acoustic waveguides with sharp bends and subwavelength imaging capabilities.

Findings

Nearly perfect transmission for Gaussian beams at various incident angles.

Achieved subwavelength imaging resolution of 0.37λ.

Demonstrated effective acoustic wave manipulation with sonic crystals.

Abstract

A sharp bending scheme for the self-collimation of acoustic waves is proposed by simply truncating the sonic crystals. An all-angle and wide-band 90{\deg}-bending wave guide is demonstrated with nearly perfect transmissions for Gaussian beams at a wide range of incident angles. A 90{\deg}-bended imaging for a point source with a subwavelength resolution of 0 0.37{\lambda} is also realized by the proposed structure. These results will find applicability in the manipulation of acoustic waves by sonic crystals.