Theoretical study of subwavelength imaging by acoustic metamaterial slabs

TL;DR

This paper provides a theoretical analysis of subwavelength imaging using acoustic metamaterial slabs with negative parameters, demonstrating potential for advanced acoustic device design.

Contribution

It introduces novel theoretical models for acoustic metamaterials capable of subwavelength imaging with negative mass density and modulus.

Findings

Near-field subwavelength image formed by evanescent waves

Real subwavelength image achieved with negative parameters

Insights for designing acoustic metamaterial devices

Abstract

We investigate theoretically subwavelength imaging by acoustic metamaterial slabs immersed in the liquid matrix. A near-field subwavelength image formed by evanescent waves is achieved by a designed metamaterial slab with negative mass density and positive modulus. A subwavelength real image is achieved by a designed metamaterial slab with simultaneously negative mass density and modulus. These results are expected to shed some lights on designing novel devices of acoustic metamaterials.