Title :
Piezoelectric interfacial waves in langasite and dilithium tetraborate
Author :
Danicki, E. ; Laprus, W.
Author_Institution :
Polish Acad. of Sci., Warsaw, Poland
Abstract :
Waves propagating along a perfectly conducting plane embedded in a piezoelectric medium are investigated. Numerical analysis of trigonal langasite (LGS) and cubic dilithium tetraborate (LBO) crystals shows that such waves exist for many orientations of the conducting plane with respect to the crystallographic axes, and for many directions of propagation. The wave velocity is close to that of the slowest shear wave for the same direction, and the piezoelectric coupling coefficient can be as high as 1.65% for LBO and 0.25% for LGS. The conditions of existence, and the properties of the most interesting waves are presented. Expected applications are discussed
Keywords :
acoustic dispersion; acoustic wave propagation; acoustic wave velocity; eigenvalues and eigenfunctions; gallium compounds; interface phenomena; lanthanum compounds; lithium compounds; piezoelectric materials; La3Ga5SiO14; Li2B4O7; conditions of existence; conducting plane orientations; cubic dilithium tetraborate; dispersive equation; eigenvalue problem; numerical analysis; perfectly conducting plane; piezoelectric coupling coefficient; piezoelectric interfacial waves; piezoelectric medium; slowest shear wave; trigonal langasite; wave propagation; wave velocity; Crystallography; Crystals; Encapsulation; Numerical analysis; Optical coupling; Radio access networks; Strips; Surface acoustic waves; Tensile stress; Thermal stresses;
Conference_Titel :
Ultrasonics Symposium, 1995. Proceedings., 1995 IEEE
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-2940-6
DOI :
10.1109/ULTSYM.1995.495734
