光子晶格带隙展宽及理论模拟  

Photonic Crystal Lattice Band Gap Broadening and Its Theoretical Simulation

作　　者：李永辉[1] 杨立森[1] 逯文婷[1] 房艳永[1] 

机构地区：[1]内蒙古师范大学物理与电子信息学院,内蒙古呼和浩特010022

出　　处：《河北师范大学学报（自然科学版）》2013年第2期143-148,共6页Journal of Hebei Normal University：Natural Science

基　　金：国家自然科学基金(60467002);内蒙古自然科学基金(2009MS0905);内蒙古师范大学研究生科研创新基金(CXJJS11044)

摘　　要：用傅里叶干涉法,在LiNbO3∶Fe晶体中制作了一维光子晶格,改变振幅掩膜孔的数目,测定其光子晶格的带隙,利用功率计测量其衍射效率,在掩膜孔数从2个增加到5个过程中发现,掩膜孔数为5时晶体的光子晶格带隙最宽,晶格的衍射效率最高,读出光子晶格,衍射光的数目从1个变成了4个,使单个Bragg衍射角增加为多个,相当于增加了Bragg带宽.并使用Mathematica软件数值模拟了写入光子晶格的理论模型,理论上解释了带隙增宽的原因.Designed a one-dimensional photonic lattice in LiNbO3∶Fe crystals by Fourier transform and measured the diffraction efficiency by power detector. Change the hole number of the amplitude mask and determine the photonic lattice＇s band-gap. When the hole number is five, the photonic crystal lattice has the most wide band and. The diffraction efficiency of grid work is the highest. If the hole number of the mask is increased from two to five, the number of diffraction light will increase from one to four, making the single Bragg diffraction angle increase for multiple,equivalent to increase the Bragg bandwidth. The writen photon lattice theory model is simulated by mathematica numerical simulation. The band-gap broadening is explained successfully in theory.

关 键 词：非线性光学 光子晶格 傅里叶干涉法 LiNbO3∶Fe晶体 Mathematica数值模拟 

分 类 号：O437[机械工程—光学工程]