移动与静止压电晶体之间表面声波的共振产生。

Resonant generation of surface acoustic waves between moving and stationary piezoelectric crystals.

作者信息

Khudik Vladimir N, Theodosiou Constantine E

机构信息

Department of Physics and Astronomy, University of Toledo, Toledo, Ohio 43606, USA.

出版信息

J Acoust Soc Am. 2007 Dec;122(6):3405-8. doi: 10.1121/1.2799503.

DOI:10.1121/1.2799503

PMID:18247749

Abstract

The propagation of surface acoustic waves in a system composed of two piezoelectric crystals moving with respect to each other and separated by a vacuum gap is considered. The waves are localized on different sides of the gap and coupled only through the electrostatic interaction. It is shown that when the velocity of the relative motion of crystals is close to some value, there occurs a wave instability resulting in a resonant generation of these surface waves. The rate of growth of Bleustein-Gulyaev waves in piezoelectric crystals of 6mm symmetry class is determined analytically.

摘要

考虑在一个由两个相互相对运动且被真空间隙隔开的压电晶体组成的系统中表面声波的传播。这些波局域在间隙的不同侧，并且仅通过静电相互作用耦合。结果表明，当晶体的相对运动速度接近某个值时，会出现波的不稳定性，导致这些表面波的共振产生。通过解析方法确定了6mm对称类压电晶体中布勒斯廷 - 古利亚耶夫波的增长率。