十重准晶光子晶体缺陷模性质研究  

Investigation on Defect-Mode Property of Ten-Fold Photonic Quasicrystal

作　　者：武毓龙[1] 孙晓红[1] 刘薇[1] 

机构地区：[1]郑州大学信息工程学院河南省激光与光电信息技术重点实验室,河南郑州450052

出　　处：《激光与光电子学进展》2013年第6期163-167,共5页Laser & Optoelectronics Progress

摘　　要：研究了十重准晶光子晶体(QPC)缺陷模的性质,观察引入不同缺陷时十重准晶对光路的影响。基于介质柱在空气背景中的十重准晶光子晶体结构,用时域有限差分法(FDTD)计算其透射谱,通过改变晶体结构,引入点缺陷和线缺陷,研究缺陷模的特性,观察光路变化情况,从而设计出特性优良的微腔和波导结构。在TE偏振模式下,改变介质柱的形状、大小和缺失等,观察缺陷准晶透射谱特性的变化。计算点缺陷微腔品质因子(Q值)并优化微腔结构,发现当去掉中心点介质柱时十重准晶有最大的Q值。设计不同缺陷的波导结构,观察光场的传播情况,发现不同的波导结构可以控制不同的光路和选择不同的入射光频率。The defect-mode property of ten-fold photonic quasicrystal （PQC） is investigated, and the changes of light path when introducing different defects are observed. The transmission spectra of ten-fold PQC are calculated by using finite-difference time-domain （FDTD） method. By changing the crystal structure and introducing the point and line defects, the defect-mode characteristics are investigated, leading to the design of good micro-cavity and waveguide structures. In TE mode, the transmission spectra with defect modes are observed and quality （Q） factors are calculated to optimize the micro-cavity structure.It has the biggest Q factor when the central dielectric cylinder is removed. Furthermore, we design different waveguide structures and explore the field distribution. Different waveguide structure can be used to control different light path and choose different incident light frequency.

关 键 词：物理光学 十重准晶光子晶体 缺陷模 品质因子 有限时域差分法 

分 类 号：O436[机械工程—光学工程]