采用了结构为(B′A′)N(A′B′)N (B′′A′′)N(A′′B′′)N的光子晶体异质结来设计一维全方向滤波器。利用传输矩阵法对该结构的透射性能进行了分析, 并结合遗传算法对该光子晶体异质内各组元厚度比和组元的周期数进行了优化, 最终得到一个相对较优的一维光子晶体滤波器。该滤波器具有较宽的滤波频带, 并且具有很好的方向选择特性, 是一种高精度的一维全方向光子晶体滤波器, 可广泛应用于滤波器、光开关等光通讯领域。

A photonic heterostructure, described as (B′A′)N(A′B′)N (B″A″)N(A″B″)N, is applied to design one dimensional (1D) omnidirectional filters. Using the transmission matrix method, we have investigated the transmission property of such structure, while the genetic algorithm is as well adopted to make an optimization for different periodic number and thickness ratios in the heterostructure. Finally, we got a relatively good 1D photonic filter, which not only has relatively broad omnidirectional filter bandwidth but also presents perfect performance in direction-selection. As a high-precise omnidirectional photonic filter, it can be widely used in filters, optical switches and many other optical telecommunication areas.