This paper elaborates on how the finite element method is employed to model surface acoustic waves generated by high aspect ratio electrodes and their interaction with optical waves in a waveguide. With a periodic model it is shown that these electrodes act as a mechanical resonator which slows down the SAWvelocity because of mechanical energy storage. A finite model is furthermore employed to study the acousto-optical interaction and shows that it is possible to get a bigger change in effective refractive index with these surface acoustic waves compared to using conventional interdigital transducers. Thus, this indicates a way to improve acousto-optical interaction.
|Title of host publication||Proceedings of the 9. International Conference on Computational Structures Technology|
|Editors||BHV Topping, M Papadrakakis|
|Place of Publication||Stirlingshire, United Kingdom|
|Publication status||Published - 2008|
|Event||9th International Conference on Computational Structures Technology - Athens, Greece|
Duration: 2 Sep 2008 → 5 Sep 2008
Conference number: 9
|Conference||9th International Conference on Computational Structures Technology|
|Period||02/09/2008 → 05/09/2008|
- finite element analysis
- perfectly matched layers
- piezoelectric material
- acousto-optic interaction
- surface acoustic waves
Dühring, M. B., Laude, V., & Khelif, A. (2008). Finite element analysis of surface acoustic waves in high aspect ratio electrodes. In BHV. Topping, & M. Papadrakakis (Eds.), Proceedings of the 9. International Conference on Computational Structures Technology (pp. paper 90). Civil-Comp Press.