液晶光子晶体的负折射特性研究  

Tunable Negative Refraction Photonic Crystals Filled with Liquid Crystals

作　　者：杨明玮[1] 肖峻[1] 李锐[1] 

机构地区：[1]电子科技大学光电信息学院,成都611731

出　　处：《光子学报》2013年第2期176-180,共5页Acta Photonica Sinica

基　　金：电子科技大学光电信息学院本科生研究训练计划资助

摘　　要：可调光子晶体由于其潜在的应用价值成为现今光子晶体研究中的一个热点.本文提出了通过光诱导液晶来调节光子晶体负折射效应的方法,采用平面波展开法、等频图分析法和推广的斯涅尔定理分析了二维液晶正方晶格光子晶体负折射的可调节性.提出了一种新型的液晶光子晶体结构,数值模拟结果表明:通过偏振光改变液晶指向矢可以调节该液晶光子晶体的负折射.与电场调制方法相比,该光控液晶取向技术具有响应速度快、结构简单的优点.这种可调光子晶体可用于制作光控路由或者应用于全光网络.Tunable negative refraction photonic crystals have attracted much attention for their potential application value.The photonic crystal with a square lattice of Si cylinders surrounded by optically controlled liquid crystals is investigated.The plane wave expansion method is used to calculate the equi-frequency surface（EFS）.The General Snell’s Law and EFS analysis method is used to ensure the ability of tunable refraction.A new photonic crystal filled with liquid crystal structure is designed.Numerical simulation result shows that this kind of tunable negative refraction photonic crystal filled with optically controlled liquid crystals can be achieved.Compared with electronically controlled one,this way has a faster response speed and a more simple structure,which may be used in optically controlled router and all optical networks.

关 键 词：液晶 光子晶体 平面波展开法 负折射 

分 类 号：O436[机械工程—光学工程] O734.2[理学—光学]