Nondestructive characterization of the domain structure of periodically poled lithium niobate crystal based on rigorous coupled-wave analysis  

作　　者：田宝璐 陈怀熹 Choge Dismas K 许艺斌 李广伟 梁万国 

机构地区：[1]Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China

出　　处：《Optoelectronics Letters》2017年第3期206-209,共4页光电子快报（英文版）

基　　金：supported by the National High Technology Research and Development Program of China(No.2013AA030501)

摘　　要：We report rigorous coupled-wave analysis(RCWA) method to non-destructively characterize the domain structure of periodically poled lithium niobate(PPLN) crystal. The strong light diffraction effect is achieved by applying a proper external voltage. We can observe reversed domain pattern and employ the detected diffraction intensity to optimally fit the result of RCWA based on least square method. Compared with conventional scalar diffraction theory, more accurate domain structure parameters with accuracies of 0.05 μm and 0.005 for the period and duty cycle are obtained respectively. It is proved that accurate, real-time and nondestructive characterization can be realized via this method.

关 键 词：rigorous lithium periodically scalar applying characterize grating realized nondestructive silica 

分 类 号：O614.111[理学—无机化学] O76[理学—化学]