具有线缺陷二维光折变光子晶格的制备研究  

The Research of Fabricating Two-Dimensional Photorefractive Photonic Lattice within Linear-defect

作　　者：崔俊杰[1] 杨立森[1] 张宝光[1] 陈宝东[1] 付存宝[1] 何冬梅[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：《光学学报》2009年第12期3452-3457,共6页Acta Optica Sinica

基　　金：国家自然科学基金(60467002);内蒙古师范大学研究生科研创新基金(YJS07022)资助课题

摘　　要：利用交叉相位法采用波长为532nm激光在自散焦光折变晶体LiNbO2：Fe中成功地制作了带有线缺陷的二维光折变光子晶格，晶格周期为12．8μm×12．8μm，线缺陷宽度为32．6μm。对其晶格线缺陷局域光的特性进行了详细的实验观测和初步的理论研究。实验结果表明，在折射率变化量仅有10^-3～10^-3的LiNbO3：Fe晶体中，由于光折变光子晶格的存在，以及晶格带隙的作用，负折射率的线缺陷具有局域光和导光的作用。实验结果说明：在LiNbO3：Fe中写入带有线缺陷的二维光折变光子晶格并把光波局域在缺陷内部是完全可行的。利用此性质，可以制作类似于光子晶体光纤的光学元件，对光通信的发展是非常重要的。Utilizing the method of cross phase, the two-dimensional photorefractive photonic lattice with linear-defect is fabricated in self-defocusing photorefractive crystal by 532 nm laser. The lattice-spacing is 12.8μm×12.8μm and linear defect width is about 32.6 9m. The result proves that it makes localizing and guiding the beam with linear defect come true in LiNbO3：Fe crystal, which minus refractive index is only 10^-3～10^-3 because the existence of photonic lattice and the effect of band gap. The result indicates that it is feasible to fabricate two-dimensional photorefractive photonic lattice with linear defect in LiNbO3：Fe crystal and localize the beam in the linear defect. Utilizing this property, it can make optical component which is similar to photonic crystal fibers. It is very important for optical communication＇s developing.

关 键 词：光折变光子晶格 局域 交叉相位法 线缺陷 

分 类 号：O437[机械工程—光学工程]