Title :
Efficiency and directivity patterns of SH wave due to interband light absorption near junction of two materials
Author :
Zhang, Xiaorong ; Guaev, V.E.
fDate :
Oct. 31 1994-Nov. 3 1994
Abstract :
A theoretical analysis of the shear horizontal wave (SH wave) excited by interband light absorption at junction of two bonded crystal materials is presented. A semiconductor crystal of class 6 mm is bonded with other material side by side. The junction (or interface at bonded line) is normal to the surface of them, and is irradiated by laser beam. An explicit analytical solution for SH wave is obtained by choosing the coordinate Z-axis along the axis of 6-fold symmetry axis C6, which lies on the surface of the crystal, and using Fourier and Laplace transform methods. The theoretical results show that the efficiency and the directivity pattern of SH wave excited by laser beam are related to the parameters of the two materials. It can be said that not only the elastic loading but also the piezoelectric loading leads to the enhancement of the laser SH ultrasonic wave (PA) transformation efficiency
Keywords :
Fourier transforms; Laplace transforms; laser beam effects; light absorption; ultrasonic propagation; ultrasonic waves; Fourier transform method; Laplace transform method; SH wave; bonded crystal materials; coordinate Z-axis; directivity patterns; efficiency; elastic loading; interband light absorption; laser beam irradiation; piezoelectric loading; shear horizontal wave; ultrasonic wave; Acoustic propagation; Fourier transforms; Laplace transforms; Laser radiation effects; Optical propagation in absorbing media; Piezoelectric radiation effects;
Conference_Titel :
Ultrasonics Symposium, 1994. Proceedings., 1994 IEEE
Conference_Location :
Cannes, France
Print_ISBN :
0-7803-2012-3
DOI :
10.1109/ULTSYM.1994.401752
