具有禁带展宽特性的一维光子晶体

A One-dimensional Photonic Crystal Structure with a Large Absolute Band Gap

提出了介质的光学厚度系数成圆形分布的一维光子晶体结构 ,与周期结构的光子晶体相比 ,该结构具有禁带展宽特性 同时讨论了起止膜层及膜层的光学厚度对该结构禁带特性的影响 ,优化出了在所选材料的介电常数所允许的频率范围内 。

A photonic crystal structure with optical thickness′ distribution according to a circular function is presented. This structure displays a wide band-gap. The influences of the beginning , ending layers and the optical thickness to the photonic crystal bandgaps are discussed. Optimization of a broad band reflector is also suggested.