BaTiO₃晶体薄膜波导极化导模与晶体双折射和波导结构的相关性
Correlation of the Polarized Guided Modes of BaTiO₃ Crystal Film Waveguide with the Crystal Birefringence and Waveguide Structure

钛酸钡(BaTiO₃)作为具有超高电光效应的铁电晶体，近年来已经成为光电子器件领域研究的前沿和热点之一。本文研究了BaTiO₃晶体薄膜波导中光偏振态的变化与晶体双折射和波导结构的关系，从理论上对BaTiO₃晶体薄膜波导结构的双折射与光偏振态之间的关系进行了建模，并通过实验得到了两种不同波导结构得到的输出光偏振态。进一步，结合理论和实验结果，分析了光偏振态变化与晶体双折射和波导结构的关系。
Barium titanate (BaTiO₃), as a ferroelectric crystal with high electro-optical effect, has become one of the frontiers and hot topics in the field of optoelectronic devices in recent years. This paper reports on an investigation of the correlations of polarization modes with the birefringence and structure of BaTiO₃ crystal film waveguides. In theory, the relation between the optical polarized mode and the birefringence of BaTiO₃ crystal film waveguide structure is modeled, and then the numerical simulations are carried out. In experiments, the different polarization modes of two different waveguide structures are observed. Further, based on the theoretical and experimental results, the correlations of the polarized modes with both the birefringence and waveguide structure are analyzed.