Acoustic coherent perfect absorbers

Song, Jung Soo; Bai, Peng; Hang, Zhi Hong; Lai, Yun

doi:10.1088/1367-2630/16/3/033026

Cited by 85 publications

(56 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These pressure peaks are caused by surface resonance, and have been observed at the interfaces of the water and metamaterial. [40][41][42] When surface plasmons are excited on negative permittivity materials in optics, similar acoustic surface excitations are expected to appear on the acoustic metamaterial with negative density. The normal velocity and pressure should be continuous across the interfaces.…”

Section: Discussionmentioning

confidence: 99%

“…The transmission may exceed unity as a result of the interference between incident and reflected waves in a standing wave field, which causes the redistribution of acoustic energy in space. [40][41][42] For Medium I, the transmission behavior is exactly the same regardless of the side from which the incident wave enters. Hence, Medium I demonstrates no directional dependence on wave propagation behavior.…”

Section: -4mentioning

confidence: 91%

See 1 more Smart Citation

Asymmetric transmission of acoustic waves in a layer thickness distribution gradient structure using metamaterials

et al. 2016

View full text Add to dashboard Cite

This research presents an innovative asymmetric transmission design using alternate layers of water and metamaterial with complex mass density. The directional transmission behavior of acoustic waves is observed numerically inside the composite structure with gradient layer thickness distribution and the rectifying performance of the present design is evaluated. The layer thickness distributions with arithmetic and geometric gradients are considered and the effect of gradient thickness on asymmetric wave propagation is systematically investigated using finite element simulation. The numerical results indicate that the maximum pressure density and transmission through the proposed structure are significantly influenced by the wave propagation direction over a wide range of audible frequencies. Tailoring the thickness of the layered structure enables the manipulation of asymmetric wave propagation within the desired frequency range. In conclusion, the proposed design offers a new possibility for developing directional-dependent acoustic devices.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: -4mentioning

confidence: 91%

Asymmetric transmission of acoustic waves in a layer thickness distribution gradient structure using metamaterials

et al. 2016

View full text Add to dashboard Cite

show abstract

“…Following a few theoretical suggestions [24,25], an acoustic CPA was recently experimentally demonstrated using decorated membrane resonators [150]. Acoustic CPAs have a host of intriguing potential applications, such as noise control.…”

Section: Applicationsmentioning

confidence: 99%

Coherent perfect absorbers: linear control of light with light

et al. 2017

View full text Add to dashboard Cite

Absorption of electromagnetic energy by a material is a phenomenon that underlies many applied problems, including molecular sensing, photocurrent generation and photodetection. Commonly, the incident energy is delivered to the system through a single channel, for example by a plane wave incident on one side of an absorber. However, absorption can be made much more efficient by exploiting wave interference. A coherent perfect absorber is a system in which complete absorption of electromagnetic radiation is achieved by controlling the interference of multiple incident waves. Here, we review recent advances in the design and applications of such devices. We present the theoretical principles underlying the phenomenon of coherent perfect absorption and give an overview of the photonic structures in which it can be realized, including planar and guidedmode structures, graphene-based systems, parity-and time-symmetric structures, 3D structures and quantum-mechanical systems. We then discuss possible applications of coherent perfect absorption in nanophotonics and, finally, we survey the perspectives for the future of this field.

show abstract

“…Moreover, acoustic metamaterials with both negative effective bulk modulus and negative effective mass density have been proposed theoretically and experimentally [17][18][19][20][21]. Using the negative effective bulk modulus and the negative effective mass density, various pioneering and important applications such as acoustic cloaking [22][23][24][25][26][27][28][29][30][31][32], acoustic superlens and hyperlens [33][34][35][36][37][38][39][40][41][42], and acoustic black hole devices [43,44] have been proposed.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear dynamics of a model of acoustic metamaterials with local resonators

Higashiyama

Doi

Nakatani

2017

NOLTA

View full text Add to dashboard Cite

Abstract:Nonlinear dynamics of a model of acoustic metamaterials with local resonators are investigated numerically and theoretically. We focus on dynamics of band edge modes (BEMs) and zone boundary modes (ZBMs) which are on the upper bounds of acoustic bands and optical bands of the phonon dispersion band. It is found that, in a region of weak anharmonicity, higher harmonics of a fundamental mode and static displacement are excited in both BEM and ZBM if the geometrical relation between the main lattice and the local resonators has evenorder nonlinearity. Numerical solutions of nonlinear periodic orbits which are continued from vibrations in the small amplitude limit by the shooting method indicate that structure of the periodic orbits of the local resonators depends on the form of nonlinear terms of the geometrical relation. Moreover, the nonlinear periodic orbits become unstable when the amplitude of the periodic orbit becomes larger. Direct numerical simulations show that unstable dynamics occur due to modulational instability. After destabilization of the nonlinear periodic orbits, spatial energy localization is also observed.

show abstract

Acoustic coherent perfect absorbers

Cited by 85 publications

References 45 publications

Asymmetric transmission of acoustic waves in a layer thickness distribution gradient structure using metamaterials

Asymmetric transmission of acoustic waves in a layer thickness distribution gradient structure using metamaterials

Coherent perfect absorbers: linear control of light with light

Nonlinear dynamics of a model of acoustic metamaterials with local resonators

Contact Info

Product

Resources

About