中文摘要：

设计了一种基于绝缘层上硅（SOI）的推挽式硅-有机物混合（SOH）马赫-曾德干涉型（MZI）电光调制器。利用薄膜模式匹配法对槽波导（slot）的光场分布进行了仿真分析,优化后得到了限制因子为0.32的slot波导结构。采用推挽式马赫-曾德干涉仪结构,并在相移臂嵌入LX M1非线性有机材料,得到半波电压-长度积V_π·L为0.885V·mm、电学响应带宽f_（RC）可达123.2GHz、开关速度为8.11ps的SOH调制器结构。利用基于本征有限元法求解麦克斯韦方程,对共平面波导电极系统进行了计算仿真,获得了特性阻抗接近50Ω、高频速率匹配的电极结构。

英文摘要：

A push-pull SOH MZI electro-optic modulator based on SOI was designed.The optical field distribution of slot waveguide was simulated and analyzed using the film mode matching（FMM）solver,and the field confinement factor of the waveguide is obtained as 0.32.Combining the characteristics of the MZI structure and nonlinear polymer material LX-M1 which has large nonlinear coefficient r33,the voltage-length products V_π·Lof 0.885V·mm and the bandwidth of 123.2GHz can be obtained by numerical analysis.A typical coplanar waveguide（CPW）electrode system was designed by solving Maxwell＇s equations explicitly with a finiteelements based eigensolver.The electrode structure with the impedance matching of 50Ωand high-frequency velocity matching was achieved.