类蜂窝状结构完全带隙二维光子晶体

Photonic Crystal with Absolute Band Gap in a Two-Dimensional Quasi-Honeycomb Structure

通过在二维三角晶格中引入两个完全一样的介质圆柱构成了类蜂窝状结构光子晶体,并对其光子能带进行了频域计算。借助数值方法分析了介质柱位置改变对光子能带的影响,计算结果表明,这种类蜂窝状结构二维光子晶体可以产生很宽的带隙,而且在一定填充率下,可以通过调整介质柱的位置使完全光子带隙达到最大化。

A type of two-dimensional photonic crystals with a quasi-honeycomb structure, which is formed by introducing two consistent dielectric cylinders into a triangular lattice, is investigated here. The relationship of its band gaps with the position of cylinders is numerically calculated and the photonic energy band is evaluated by the frequency domain method. The calculated results demonstrate the existence of large band gaps in quasi-honeycomb structured two-dimensional photonic crystal. At a certain filling ratio, the largest absolute bandgap can be obtained by optimizing the position of the cylinders introduced.