Effect of dimension variation for second-harmonic generation in lithium niobate on insulator waveguide[Invited]  

作　　者：Xiao-Hui Tian Wei Zhou Kun-Qian Ren Chi Zhang Xiaoyue Liu Guang-Tai Xue Jia-Chen Duan Xinlun Cai Xiaopeng Hu Yan-Xiao Gong Zhenda Xie Shi-Ning Zhu 田晓慧;周唯;任坤乾;张弛;刘潇月;薛广太;端家晨;蔡鑫伦;胡小鹏;龚彦晓;谢臻达;祝世宁(National Laboratory of Solid State Microstructures,School of Physics,School of Electronic Science and Engineering,College of Engineering and Applied Sciences,and Collaborative Innovation Center of Advanced Microstructures,Nanjing University,Nanjing 210093,China;State Key Laboratory of Optoelectronic Materials and Technologies and School of Physics and Engineering,Sun Yat-sen University,Guangzhou 510275,China)

机构地区：[1]National Laboratory of Solid State Microstructures,School of Physics,School of Electronic Science and Engineering,College of Engineering and Applied Sciences,and Collaborative Innovation Center of Advanced Microstructures,Nanjing University,Nanjing 210093,China [2]State Key Laboratory of Optoelectronic Materials and Technologies and School of Physics and Engineering,Sun Yat-sen University,Guangzhou 510275,China

出　　处：《Chinese Optics Letters》2021年第6期76-80,共5页中国光学快报（英文版）

基　　金：supported by the National Key R&D Program of China(No.2019YFA0705000);Key R&D Program of Guangdong Province(No.2018B030329001);Leading-edge Technology Program of Jiangsu Natural Science Foundation(No.BK20192001);National Natural Science Foundation of China(Nos.51890861,11690031,11674169,91950206,and 11974178);Fundamental Research Funds for the Central Universities(No.021314380177)。

摘　　要：We study the effect of dimension variation for second-harmonic generation(SHG) in lithium niobate on insulator(LNOI)waveguides. Non-trivial SHG profiles in both type-0 and type-I quasi-phase matching are observed during the wavelength tuning of the fundamental light. Theoretical modeling shows that the SHG profile and efficiency can be greatly affected by the waveguide cross-section dimension variations, especially the thickness variations. In particular, our analysis shows that a thickness variation of tens of nanometers is in good agreement with the experimental results. Such investigations could be used to evaluate fabrication performance of LNOI-based nonlinear optical devices.

关 键 词：lithium niobate on insulator second-harmonic generation dimension variation 

分 类 号：O437[机械工程—光学工程] TQ131.11[理学—光学]