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

被引：49

作者：

Croenne, C. ^{[1
]}

Vasseur, J. O. ^{[1
]}

Matar, O. Bou ^{[1
]}

Ponge, M. -F. ^{[2
]}

Deymier, P. A. ^{[3
]}

Hladky-Hennion, A. -C. ^{[1
]}

Dubus, B. ^{[1
]}

机构：

[1] Univ Lille, Univ Valenciennes, CNRS, ISEN,Cent Lille,UMR 8520,IEMN, F-59000 Lille, France

[2] Univ Bordeaux 1, Dept APY UMR CNRS 5295, Inst Mecan & Ingn, 351 Cours Liberat, F-33405 Talence, France

[3] Univ Arizona, Dept Mat Sci & Engn, Tucson, AZ 85721 USA

来源：

APPLIED PHYSICS LETTERS | 2017年 / 110卷 / 06期

关键词：

Boundary conditions - Elastic waves - Piezoelectricity - Phonons - Modulation - Brillouin scattering - Electric connectors;

D O I：

10.1063/1.4975680

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

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. Published by AIP Publishing.

引用

页数：5

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