中文摘要：

基于光子晶体异质结结构的全光二极管是目前的一个研究热点,使其具有更好的单向传输特性是研究的一个目标.本文中通过改变异质结界面处的光子晶体结构,提出了不同的优化设计方案,在宽频带内实现了高对比度全光二极管的高效率单向传输,并且该结构还具有分束特性.

英文摘要：

In recent years, all-optical diodes based on photonic crystal heterostructures have attracted much attention, and their good characteristics of one-way transmission are the long pursued target. In this paper, different optimized designs are proposed by modifying the photonic crystal structure at the heterostructure interface. And the all-optical diodes with high contrast, which have both efficient unidirectional transmission and beam splitting, are realized in wide bandwidths.