Acoustic manipulation through zero-thickness perforated plane with strong-coupling effects

TL;DR

This paper demonstrates that strong-coupling effects in a zero-thickness perforated plane can manipulate acoustic waves effectively, enabling ultrathin acoustic devices for applications like focusing and holography.

Contribution

It introduces a novel approach to acoustic manipulation using strong-coupling effects in ultrathin structures, bypassing traditional thickness constraints.

Findings

Successful experimental demonstration of acoustic focusing.

Effective acoustic holography achieved with ultrathin structures.

Strong-coupling effects regulate wave manipulation without increasing thickness.

Abstract

How to manipulate acoustic waves through thinner structures is always a challenging problem due to the linear proportional relationship between the structural thickness and the acoustic wavelength. Here, we show the possibility of breaking this relationship by the strong-coupling effects of the radiated waves on the zero-thickness two-dimensional perforated plane, rather than reducing the thickness of the three-dimensional structure by the resonance mechanism of the cavity structure. The strong-coupling effects can be achieved and regulated by the self and mutual radiation between acoustic waves from different holes in the zero-thickness plane. We experimentally demonstrate the effectiveness of our approach by implementing acoustic focusing and holography. Our work introduces a different perspective for manipulating acoustic waves and will enable the application of ultrathin acoustic devices.