摘要
利用多层结构声表面波的精确模型对决定衍射光栅常数的声表面波传播特性进行了研究,其衍射光栅可使波导中导模向漏模转换,这一现象可用耦合模理论解释。模式转换效率可化作声波频率、声光作用长度、波导厚度和声波功率密度的函数,并利用数值计算得出结果。
The collinear surface acoustic wave properties that determine the induced grating parameters have been investigated using a rigorous modeling of the surface acouseic wave propagation in multiplayer. The guided-to-leaky mode conversion by the induced diffraction grating from surface acouseic wave is analyzed using a generalized multimode formulation of the coupled mode theory. Mode conversion efficiency has been calculated as functions of acoustic frequency, interaction length, guiding layer thickness, and acoustic drive power density.
出处
《电子科技大学学报》
EI
CAS
CSCD
北大核心
2003年第3期331-333,共3页
Journal of University of Electronic Science and Technology of China
关键词
共线声光效应
模式转换效率
耦合模理论
collinear acoustooptic interaction
mode conversion efficiency
coupled mode theory
