紫外及深紫外光子晶体微腔特性研究  

Properties of ultraviolet and deep-ultraviolet photonic crystal micro-cavities

作　　者：冯向 高娜[1,2] 朱啟芬 黄凯[1] 康俊勇[1] FENG Xiang;GAO Na;ZHU Qi-fen;HUANG Kai;KANG Jun-yong(Fujian Provincial Key Laboratory of Semiconductors and Applications,Xiamen University, Xiamen 361005, China;Fundamental Physics Teaching Laboratory, Department of Physics,Xiamen University, Xiamen 361005, China)

机构地区：[1]厦门大学物理系福建省半导体材料及应用重点实验室,福建厦门361005 [2]厦门大学物理系物理基础教学实验室,福建厦门361005

出　　处：《物理实验》2019年第6期9-15,共7页Physics Experimentation

基　　金：国家重点研发计划资助(No.2016YFB0400903);国家自然科学基金资助(No.61604124);福建省自然科学基金资助(No.2017J01121);中央高校基本业务费专项资助(No.20720170098)

摘　　要：运用平面波展开法并结合有限时域差分法仿真计算了紫外及深紫外波段光子晶体微腔能带和品质特性.结果表明:四角晶格结构的光子晶体相应能带中的光子禁带宽度较窄,不利于形成对紫外波段光子的局域和限制;通过调控和改变二维光子晶体的晶格类型和晶格常量以及设计单一甚至多缺陷的晶格,所形成的局域电场明显增强.优化填充因子,获得了品质因数可高达6 107的多缺陷光子晶体微腔结构.Plane wave expansion method was used combined with FDTD method to calculate the band structures and quality factors of ultraviolet and deep-ultraviolet photonic crystal micro-cavities. The results showed that the width of the band gap of square lattice photonic crystal structure was extremely narrow, it was not beneficial to the enhancement of the electric field for restricting photons in ultraviolet range. Thus, by controlling the lattice structure and the lattice constant of two-dimensional photonic crystal, and by introducing single point defect and multiple defects, remarkable strengthening of the electric field was observed. Furthermore, the filling factor was optimized to obtain a quality factor as high as 6 107 in the photonic crystal micro-cavity with multiple defects.

关 键 词：紫外及深紫外 光子晶体微腔 光子能带 品质因数 时域差分法 

分 类 号：O73[理学—晶体学]