Interface acoustic waves in piezoelectric bi-crystalline structures of specific types

被引：11

作者：

Darinskii, AN

Weihnacht, M

机构：

[1] Russian Acad Sci, Inst Crystallog, Moscow 119333, Russia

[2] Leibniz Inst Solid State & Mat Res, D-01171 Dresden, Germany

来源：

PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES | 2005年 / 461卷 / 2056期

关键词：

acoustic waves; piezoelectric structures; interface;

D O I：

10.1098/rspa.2004.1393

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The paper discusses the properties of the acoustic waves guided by an interface inside piezoelectric media. The interfaces of two types have been considered: (i) an infinitesimally, thin metallic layer inserted into homogeneous piezoelectric crystal of arbitrary symmetry; (ii) rigidly bonded crystals whose piezoelectric coefficients differ by sign while the other material constants are identical. Several general theorems have been proved regarding the existence of interface acoustic waves (IAWs) propagating more slowly than bulk waves. In particular, a sufficient condition for the existence of such 'slow' IAWs has been derived. The propagation of leaky IAWs has been studied. Special attention has been paid to the analysis of the situation when the imaginary component of the leaky IAW velocity vanishes, resulting in the appearance of non-attenuating IAWs travelling faster than the slow transverse bulk wave. The computations performed for LiNbO3 and LiTaO3 illustrate general conclusions.

引用

页码：895 / 911

页数：17

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