用双棱镜在LiNbO_3:Fe晶体中构造大面积光子晶格  

Fabricating Large-area Photonic Lattices in LiNbO_3: Fe Crystal Using Biprisms

作　　者：武一洁[1] 杨立森[1] 王龙飞[1] 李永辉[1] 逯文婷[1] 李强[1] 施慧渊[1] 

机构地区：[1]内蒙古师范大学物理与电子信息学院,呼和浩特010022

出　　处：《首都师范大学学报（自然科学版）》2014年第2期26-29,共4页Journal of Capital Normal University：Natural Science Edition

基　　金：国家自然科学基金(60467002);内蒙古自然科学基金(2013MS0926)

摘　　要：推导了双棱镜干涉的强度,并用Matlab软件模拟了晶格图案.利用单个和正交双棱镜在LiNbO3:Fe中构造了一维和二维大面积光子晶格.通过CCD观测晶体内的晶格图案和衍射.选取不同的聚焦透镜,对比写入晶格的空间周期和衍射效率.实验结果表明,聚焦透镜焦距为450 mm时,空间周期最小,可达25.75μm,衍射效率为15.3%.Deduce interference intensity of biprisms,simulate Lattices pattern by Matlab. Fabricating large-area onedimensional and two-dimensional photonic lattices in LiNbO3： Fe use single and orthogonal biprisms. Lattices pattern in crystal and diffraction were observed by Charge Coupled Device. Select different focus lens,contrast lattices periods and diffraction efficiency. The result shows that the focus of lens is 450 mm,while space periods is minimum,attainability 25. 75 μm,and diffraction efficiency is 15. 3%.

关 键 词：双棱镜 干涉 LINBO3:FE晶体 光子晶格 布拉格衍射. 

分 类 号：O436[机械工程—光学工程]