Abstract

A generalized acoustic-mode dispersion analysis of a multilayer guiding structure that includes a combination of homogeneous layers of materials with well-defined mechanical and piezoelectric properties is developed. A few examples are also presented that are relevant to a simple bulk LiNbO₃ structure and to ZnO/GaAs and ZnO/GaAs/AlGaAs/GaAs composite structures. In particular, a surface acoustic-wave velocity of 3734 m/sec is calculated for a Y-cut LiNbO₃ monolayer, 1.4 μm thick, at an acoustic frequency of f = 650 MHz, which is in good agreement with the value in the literature, the difference being less than 1%.

© 1991 Optical Society of America

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