短程有序双周期非线性光子晶体中宽带级联三次谐波产生的研究  

Study on Broadband Cascaded Third Harmonic Generation in Short-Range Ordered Dual-Periodic Nonlinear Photonic Crystal

作　　者：牛晓颖[1] 王文杰[1] 周春花[1] 

机构地区：[1]太原理工大学新型传感器与智能控制教育部重点实验室,太原030024

出　　处：《人工晶体学报》2015年第5期1389-1393,共5页Journal of Synthetic Crystals

基　　金：国家自然科学基金青年基金(11204206);山西省回国留学人员科研资助项目(2013-037)

摘　　要：从理论和数值模拟上分析了一种一维短程有序双周期铁电畴结构中宽带级联三次谐波的产生过程。这种短程有序结构是由一系列一定长度的双周期极化铁电畴结构和任意长度的单畴结构交替构成。研究了结构参数对级联三次谐波产生过程中频谱带宽和转换效率的影响。结果表明,通过控制双周期极化结构段的长度可以实现级联频率转换过程中带宽的调节,而级联三次谐波的转换效率可以通过增加谐波和晶体的作用长度来实现。Cascaded third harmonic generation in a short-range ordered dual-periodic ferroelectric domain structure were theoretically and numerically studied. The structure is composed with an alternative change of dual-periodic poled ferroelectric segments of certain length and random length-extended single domains. The effect of structure parameters on the acceptance bandwidth and conversion efficiency of the cascaded third harmonic process was analyzed. The results show that the acceptance bandwidth can be controlled by adjusting the length of the dual-periodic poled structure, and the conversion efficiency for cascaded third harmonic generation can be improved by increasing the interacted length of harmonic with the medium.

关 键 词：级联三次谐波产生 宽带频率转换 准相位匹配 

分 类 号：TQ586.1[化学工程—精细化工]