Acoustic metamaterials: From local resonances to broad horizons

By Guancong Ma, P. Sheng. 2016

1,475 citations recorded by the source corpus.

A review of the development of acoustic metamaterials, guided by their physical characteristics and novel functionalities. 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.

Subfields: Biomedical Engineering, Electronic, Optical and Magnetic Materials, Signal Processing

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Citations in the corpus

How to See Hidden Patterns in Metamaterials with Interpretable Machine Learning (2021, background): “For example, compared to conventional composite materials, mechanical metamaterials can be surprisingly lightweight and strong [53, 65], can have controllable fracture toughness [22], and can be highly energy- and vibration-absorptive [3, 17, 35, 42, 43].”
A Review of Tunable Acoustic Metamaterials (2018, background): “Metamaterials are rationally designed artificial structures with periodically or non-periodically arranged subwavelength elements [1–4], which exhibit unusual properties beyond natural occurring media [5].”
A hybrid elastic metamaterial with negative mass density and tunable bending stiffness (2017, background): “…applications including lowfrequency vibration shielding, guided wave attenuation, seismic wave mitigation, mechanical wave guiding, absorption and energy harvesting ( Ma and Sheng, 2016; Cummer et al., 2016; Haberman and Guild, 2016; Carrara et al., 2013; Miniaci et al., 2016; Chen et al., 2016a ).”
Microlattice Metamaterials for Tailoring Ultrasonic Transmission with Elastoacoustic Hybridization (2016, background): “However, many metamaterials have been presented as proof-of-principle demonstrations on macroscopic scales [22,23,27] creating the need for microscale tailorable solutions that can function in the megahertz-frequency regime, of interest to biomedical applications.”