峰值折射率对正弦型函数光子晶体带隙的影响  

Effect of peak refractive index on band-gap of sine function photonic crystals

作　　者：熊翠秀[1] 邓杨保[1] 邓曙光[1] 

机构地区：[1]湖南城市学院通信与电子工程学院,湖南益阳413000

出　　处：《激光与红外》2014年第8期913-916,共4页Laser & Infrared

基　　金：湖南省自然科学基金项目(No.14JJ6043);湖南省益阳市科技计划项目(No.2012JZ09)资助

摘　　要：对折射率按正弦规律变化的介质进行离散化处理,采用传输矩阵法计算了一维正弦型函数光子晶体的透射率,分析了各层介质的折射率峰值对带隙结构的影响。结果表明,随着高折射率介质的峰值折射率增大,主禁带增宽且红移;随着低折射率介质的峰值折射率增大,主禁带变窄且红移;当高低折射率介质都是正弦型函数介质时,与常规光子晶体相比,平均折射率之差增大时,主禁带增宽,反之主禁带变窄。这一结果对光子晶体的设计具有一定的指导意义。The medium that its refractive index changes with the sine function was discretized,the transmissivity of one-dimensional sine function photonic crystals was calculated by transfer matrix method,and then the effect of peak refractive index on band-gap structure was analyzed.The results show that the main forbidden band is broadened and red-shifted with the increment of the peak refractive of high refractive index medium.The main forbidden band is nar-rower and red-shifted with the increment of the peak refractive of low refractive index medium.Compared with the con-ventional photonic crystals,the main forbidden band will be broadened if the averaged refractive index difference in-creases when the high and low refractive index mediums are all sine function materials.The main forbidden band will be narrower vice versa.The results have a certain reference value for the design of photonic crystal.

关 键 词：正弦型函数光子晶体 介质离散化 传输矩阵法 禁带结构 

分 类 号：O734[理学—晶体学]