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

Research output: Contribution to journalArticle

29 Scopus citations

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 languageEnglish (US)
Article number061901
JournalApplied Physics Letters
Volume110
Issue number6
DOIs
StatePublished - Feb 6 2017

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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