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In the present work, nonlinearities in temperature compensating (TC) SAW devices are investigated. The materials used are LiNbO3-rot128YX as the substrate and Copper electrodes covered with a SiO2-layer as the compensating layer. In order to understand the role of these materials for the nonlinearities in such acoustic devices, a FEM simulation model in combination with a perturbation approach [1]...
In this work, electromechanical coupling factor, K2, and Temperature Coefficient of Frequency (TCF) of Bulk Acoustic Wave (BAW) resonators based on high aspect ratio ridge structures in 42°Y-X LiTaO3 (LT) and Z-cut LT single crystals with different Li stoichiometries were studied experimentally, analytically and by combined finite element / boundary element analysis. Initially, analytical analysis...
Utilizing the `time-of-flight'-technique with double layer cells of dye sensitized liquid crystalline hexahexylthiotriphenylene (HHTT), we investigated the influence of different charge generation mechanisms. In the case of the dye-layer titanyl-phthalocyanine, charge transport in the generation layer and charge injection significantly modifies the photo current transients as compared to the nearly...
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