Acoustic metamaterials: From local resonances to broad horizons

Guancong Ma*, Ping Sheng*

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

1024 Citations (Scopus)

Abstract

Within a time span of 15 years, acoustic metamaterials have emerged from academic curiosity to become an active field driven by scientific discoveries and diverse application potentials. This review traces the development of acoustic metamaterials from the initial findings of mass density and bulk modulus frequency dispersions in locally resonant structures to the diverse functionalities afforded by the perspective of negative constitutive parameter values, and their implications for acoustic wave behaviors. We survey the more recent developments, which include compact phase manipulation structures, superabsorption, and actively controllable metamaterials as well as the new directions on acoustic wave transport in moving fluid, elastic, and mechanical metamaterials, graphene-inspired metamaterials, and structures whose characteristics are best delineated by non-Hermitian Hamiltonians. Many of the novel acoustic metamaterial structures have transcended the original definition of metamaterials as arising from the collective manifestations of constituent resonating units, but they continue to extend wave manipulation functionalities beyond those found in nature.

Original languageEnglish
Article numbere1501595
Number of pages16
JournalScience advances
Volume2
Issue number2
DOIs
Publication statusPublished - Feb 2016

Scopus Subject Areas

  • General

User-Defined Keywords

  • Metamaterials
  • Acoustics
  • Acoustic metamaterials
  • Wave Physics

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