一维光子晶体谐振腔的模式类型及其性质  

Mode Types and Their Related Properties of One-Dimensional Photonic Crystal Resonant Cavity

作　　者：孟庆生[1] 欧阳征标[1] 王仲淳 吴志荣[2] 刘宗平[2] 罗贤达[1] 王宏[1] 

机构地区：[1]深圳大学电子科学与技术学院太赫兹技术研究中心,深圳518060 [2]元智大学电机工程学系

出　　处：《光学学报》2007年第7期1290-1294,共5页Acta Optica Sinica

基　　金：国家自然科学基金(60471047);广东省自然科学基金(04011308)资助课题

摘　　要：利用光学传输矩阵法研究了一维光子晶体谐振腔的谐振波长、品质因子和缺陷层厚度之间的变化关系,发现谐振腔内存在不同级次的谐振模式;对于同一级次的谐振模式,品质因子在某一波长(λm)时达到极大值,该波长恰为光子晶体反射率最高处所对应的波长,也是该光子晶体的布拉格共振反射波长;在λm处,品质因子随级次的增加而线性增加;品质因子随周期层数增加而指数增加,但其增长因子与模式级次无关,也与周期数无关,只与谐振波长有关;对于所有级次的谐振模式,增长因子在λm处达到最大值。这对提高品质因子、减小谐振腔体积、优化谐振腔有重要意义。The influences of the thickness of defect layer on the resonant wavelength and its quality factor in onedimensional photonic crystal cavity were studied with optical transmission matrix. Numerical simulations show that there exist different mode types and a maximal quality factor for each mode type. The maximum is found at the wavelength λm where there is a maximal reflection from the photonic crystal, corresponding to the condition for resonance Bragg reflection. The quality factor and thickness of the defect layer corresponding to λm are in linear relations with the mode order number. The quality factor increases exponentially with the number of the structural periods, and the increment number is only a function of the operating wavelength, and has no relation to mode types and periods of structure. For all mode types, the increament number reaches a maximum at the wavelength λm.

关 键 词：激光技术 光子晶体谐振腔 传输矩阵法 模式类型 品质因子 

分 类 号：TB383[一般工业技术—材料科学与工程]