Characterization of response of ZnO/LiNbO3-based surface acoustic wave delay line photodetector
Journal
Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Journal Volume
47
Journal Issue
8 PART 1
Pages
6507-6512
Date Issued
2008
Author(s)
Huang, T.-J.
Abstract
In this study, the coupling-of-mode simulation is applied to the characterization of the optical response of a surface acoustic wave (SAW) photodetector. To verify the simulation results, a ZnO/LiNbO3-based SAW delay line without an oscillator and amplifier circuit is fabricated. The ZnO/LiNbO3 bilayer is proved to be a good UV-light-sensing structure where bulk LiNbO3 is used to excite the surface wave and the ZnO overlayer is a photosensitive layer. The measurement of insertion loss difference is used to clarify optical perturbation in detail. The simulation and experimental responses show a good agreement. From the measurement results of insertion loss difference, the optical characteristics (i.e., optical spectrum, dynamic responses and thermal properties) of the SAW delay line are also determined.
Type
journal article