光子晶体异质结界面畸变与传导模

本文利用平面波展开方法和超原胞方法研究了由正方形格子上放置正方形散射子和三角形格子上放置六角形散射子组成的异质结(SSTH异质结)的带隙结构．并且研究了界面处导波模，得出获得最佳导波模时的光子晶体几何物理参数．研究发现对于SSTH异质结，当沿着界面作晶格的横向拉开或者侧向滑移，都可产生界面态．支持了增加异质结界面处的畸变有利于增加局域模数量的看法．这为通过改变参数而调节界面态以满足实际需要提供了可能的方法，

The Influence of Distortion at the Interface of Photonic Crystal Heterostructures on Guide Modes

By using the plane wave expansion method combined with the supercell technique,we investigate the band structures of the heterostructure composed of square pillars in square lattice and hexagon pillars in triangular lattice(SSTH heterostucture).The calculated results show that that the SSTH heterostucture may produce guide modes in absolute photonic band gap(PBG) when introducing relatively longitudinal gliding or transverse displacement of the sub-lattices along the interface of the heterostructure.It implies that to enhance the deformation at the interface is favor of generating the guide modes.It is anticipated that the guide modes in this kind of heterostructures can be engineered by adjusting appropriate parameters.