Directional asymmetry of the nonlinear wave phenomena in a three-dimensional granular phononic crystal under gravity

Merkel, Aurélien; Tournat, Vincent; Gusev, Vitalyi

doi:10.1103/physreve.90.023206

Cited by 17 publications

(8 citation statements)

References 51 publications

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“…Such acoustic rectifiers rely on coupling a nonlinear frequency-converting medium to a phononic crystal, which permits the passing of the nonlinear signal along one direction only [12][13][14][15][16][17]. Recent advancements along this line report on the use of two coupled nonlinear resonators [18] and propagation asymmetry induced by gravity [19]. Besides the inherent frequency conversion of these devices, the nonlinear mechanisms introduce severe signal distortions and reduced signal strength.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Nonreciprocity in Loss-Compensated Piezophononic Media

2018

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Violating time-reversal symmetry enables one to engineer nonreciprocal structures for isolating and rectifying sound and mechanical vibrations. Rectifying sound is commonly achieved in nonlinear media, but the operation is inherently linked to weak and distorted signals. Here, we show how a pronounced electron-phonon coupling in linear piezophononic media under electrical bias can generate full mechanical rectification of broad spectral width, which permits the isolation of pulsed vibrations while keeping the wave-front shape fully intact. In this context, we deliberately show how the acoustoelectric effect can provide active loss compensation against lattice anharmonicity and thermoelastic damping. Further, our predictions confirm tunable nonreciprocity at an ultralarge contrast ratio, which should open the doors for future mechanical diodes and compact ultrasonic transducers for sensing and imaging.

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Section: Introductionmentioning

confidence: 99%

Dynamic Nonreciprocity in Loss-Compensated Piezophononic Media

2018

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“…Swapping source and receiver has long provided identical frequency responses due to reciprocity features, thus preventing the possible tuning of the transmission coefficient in opposite directions. In acoustics and elasticity, the reciprocity of wave propagation can be broken via three means: by using spatiotemporal dependent material properties [1], by combining nonlinear properties with an asymmetry [2][3][4], or by introducing an external bias [5,6]. Nonreciprocal devices and their applications have recently been reviewed in Ref.…”

Section: Introductionmentioning

confidence: 99%

Nonreciprocal and even Willis couplings in periodic thermoacoustic amplifiers

et al. 2021

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Thermoacoustic amplifiers are analyzed in the framework of nonreciprocal Willis coupling. The closed form expressions of the effective properties are derived, showing that an applied temperature gradient causes the appearance of a nonreciprocal Willis coupling. Even and nonreciprocal Willis couplings are exhibited already in the first-order Taylor expansion of the solution and are of equal modulus but opposite sign, thus suggesting that the even Willis coupling is a reaction to the nonreciprocity introduced by the temperature gradients. These Willis couplings cause a coalescence point in the k space, which deviates from Re(k) = 0 (with k the wave number) and is thus a zero-group-velocity point, as well as the opening of an amplification gap at low frequency. Effective parameters and scattering properties are found in excellent agreement with experimental results. This article paves the way to further control the acoustic waves at very low frequencies with nonreciprocal systems.

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“…The most commonly encountered means for breaking the reciprocity of a wave system is to induce nonlinearity into the propagation process or to have the wave interact with a localized nonlinear element 13–19,21,22 . Asymmetric devices based on such wave nonlinearity typically feature a conversion stage, as assumed by a highly nonlinear medium or element, plus a selection stage via filtering by, for example, phononic or photonic crystals.…”

Section: Introductionmentioning

confidence: 99%

Acoustic radiation pressure for nonreciprocal transmission and switch effects

et al. 2019

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Systems capable of breaking wave transmission reciprocity have recently led to tremendous developments in wave physics. We report herein on a concept that enables one-way transmission of ultrasounds, an acoustic diode, by relying on the radiation pressure effect. This effect makes it possible to reconfigure a multilayer system by significantly deforming a water-air interface. Such a reconfiguration is then used to achieve an efficient acoustic transmission in a specified direction of propagation but not in the opposite, hence resulting in a highly nonreciprocal transmission. The corresponding concept is experimentally demonstrated using an aluminum-water-air-aluminum multilayer system, providing the means to overcome key limitations of current nonreciprocal acoustic devices. We also demonstrate that this diode functionality can even be extended to the design and operations of an acoustic switch, thus paving the way for new wave control possibilities, such as those based on acoustic transistors, phonon computing and amplitude-dependent filters.

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Directional asymmetry of the nonlinear wave phenomena in a three-dimensional granular phononic crystal under gravity

Cited by 17 publications

References 51 publications

Dynamic Nonreciprocity in Loss-Compensated Piezophononic Media

Dynamic Nonreciprocity in Loss-Compensated Piezophononic Media

Nonreciprocal and even Willis couplings in periodic thermoacoustic amplifiers

Acoustic radiation pressure for nonreciprocal transmission and switch effects

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