Brillouin scattering-like effect and non-reciprocal propagation of elastic waves due to spatio-temporal modulation of electrical boundary conditions in piezoelectric media

C. Croënne; J. O. Vasseur; O. Bou Matar; M. F. Ponge; P. A. Deymier; A. C. Hladky-Hennion; B. Dubus

doi:10.1063/1.4975680

Brillouin scattering-like effect and non-reciprocal propagation of elastic waves due to spatio-temporal modulation of electrical boundary conditions in piezoelectric media

C. Croënne, J. O. Vasseur, O. Bou Matar, M. F. Ponge, P. A. Deymier, A. C. Hladky-Hennion, B. Dubus

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Abstract

The properties of a one-dimensional phononic crystal made of identical piezoelectric elements separated by thin metallic electrodes connected to the ground are studied theoretically for cases where the locations of the electrical connections change as a function of time with a specific speed. This spatio-temporal modulation of the electrical boundary conditions results in significant non-linear effects that are evidenced numerically. The interaction between an incident harmonic longitudinal wave and the time-dependent phononic crystal is shown to lead to frequency splitting analogous to Brillouin scattering. Moreover, the boundaries of the Bragg bandgaps are strongly affected, and for some specific modulation speed, one-way wave propagation can be achieved.

Original language	English (US)
Article number	061901
Journal	Applied Physics Letters
Volume	110
Issue number	6
DOIs	https://doi.org/10.1063/1.4975680
State	Published - Feb 6 2017

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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Croënne, C., Vasseur, J. O., Bou Matar, O., Ponge, M. F., Deymier, P. A., Hladky-Hennion, A. C., & Dubus, B. (2017). Brillouin scattering-like effect and non-reciprocal propagation of elastic waves due to spatio-temporal modulation of electrical boundary conditions in piezoelectric media. Applied Physics Letters, 110(6), Article 061901. https://doi.org/10.1063/1.4975680

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abstract = "The properties of a one-dimensional phononic crystal made of identical piezoelectric elements separated by thin metallic electrodes connected to the ground are studied theoretically for cases where the locations of the electrical connections change as a function of time with a specific speed. This spatio-temporal modulation of the electrical boundary conditions results in significant non-linear effects that are evidenced numerically. The interaction between an incident harmonic longitudinal wave and the time-dependent phononic crystal is shown to lead to frequency splitting analogous to Brillouin scattering. Moreover, the boundaries of the Bragg bandgaps are strongly affected, and for some specific modulation speed, one-way wave propagation can be achieved.",

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AU - Ponge, M. F.

AU - Deymier, P. A.

AU - Hladky-Hennion, A. C.

AU - Dubus, B.

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Brillouin scattering-like effect and non-reciprocal propagation of elastic waves due to spatio-temporal modulation of electrical boundary conditions in piezoelectric media

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