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Updated: Mar 28, 2026

Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations
Published on: August 21, 2018
Asymmetric Acoustic Propagation of Wave Packets Via the Self-Demodulation Effect
Thibaut Devaux1, Vincent Tournat1, Olivier Richoux1
1LUNAM Université, Université du Maine, CNRS, LAUM UMR 6613, avenue O. Messiaen, 72085 Le Mans, France.
Abstract:
This Letter presents the experimental characterization of nonreciprocal elastic wave transmission in a single-mode elastic waveguide. This asymmetric system is obtained by coupling a selection layer with a conversion layer: the selection component is provided by a phononic crystal, while the conversion is achieved by a nonlinear self-demodulation effect in a 3D unconsolidated granular medium. A quantitative experimental study of this acoustic rectifier indicates a high rectifying ratio, up to 10^{6}, with wide band (10 kHz) and an audible effect. Moreover, this system allows for wave-packet rectification and extends the future applications of asymmetric systems.
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