摘要
构建了二维硅基蜂窝状空气环型光子晶体.采用平面波展开方法,得到了硅基蜂窝状空气环型光子晶体的能带结构,分析了空气孔半径及介质柱半径对完全禁带宽度的影响,发现硅基空气环型光子晶体结构的完全禁带宽度值很小,无法优于传统硅基空气孔型光子晶体结构.为了有效增大硅基蜂窝状空气环型光子晶体的完全禁带,本文将内芯介质柱替换为高折射率或各向异性的材料.当引入高折射率的介质柱材料时,空气环型光子晶体完全禁带宽度明显增大,最大可达15.59%;进一步引入各向异性材料Te作为介质柱材料,蜂窝状空气环型光子晶体明显优于传统蜂窝状空气孔型光子晶体,最大完全禁带宽度值达到16.889%.
A two-dimensional honeycomb silicon annular photonic crystal（PC）is proposed,and the photonic band structures are obtained by using the plane wave expansion method.The effects of air-hole radius and rod radius on absolute photonic band gap（PBG）are also analyzed.The results reveal that the silicon annular PCs have small absolute PBGs and can not show more advantage than the usual air-hole silicon PCs.In order to obtain large absolute PBGs in honeycomb silicon annular PC,the inner dielectric rods have been instead of high refractive index or anisotropic materials.When involving the high refractive index dielectric rods,the absolute PBGs obviously increase and the largest absolute gap is 15.59%.Moreover,involving anisotropic Te rods in honeycomb annular PCs,the silicon annular PCs can show more advantage than the usual air-hole silicon PCs,and the largest absolute gap is 16.889%.
作者
刘丹
胡森
肖明
王筠
童爱红
吉紫娟
LIU Dan HU Sen XIAO Ming WANG Yun TONG Aihong JI Zijuan(Institute of Information Science and Technolog, Department of Physics and Mechanical and Electrical Engineering, Hubei University of Education, Wuhan 43020)
出处
《华中师范大学学报（自然科学版）》
CAS
北大核心
2016年第5期660-664,共5页
Journal of Central China Normal University：Natural Sciences
基金
湖北省教育厅中青年人才项目(Q20153004)
关键词
光子晶体
完全禁带
平面波展开法
各向异性Te
photonic crystal
absolute photonic band gap
plane wave expansion method
anisotropic tellurium
