Third-order nonlinear phenomenon generated on the inner surface of bulk lithium niobate crystals with magnesium doping  

作　　者：Xiaojing Wang Xiaobo Li Hui Xu Longhui He Xuelei Li Yulan Dong Xianfeng Chen 王晓静;李晓波;许辉;贺龙辉;李雪垒;董玉兰;陈险峰(Department of Applied Physics,Microelectronic and Physics,Hunan University of Technology and Business,Changsha 410205,China;Department of Physics and Astronomy,Shanghai Jiao Tong University,Shanghai 200240,China;Key Laboratory for Laser Plasma(Ministry of Education),IFSA Collaborative Innovation Center,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]Department of Applied Physics,Microelectronic and Physics,Hunan University of Technology and Business,Changsha 410205,China [2]Department of Physics and Astronomy,Shanghai Jiao Tong University,Shanghai 200240,China [3]Key Laboratory for Laser Plasma(Ministry of Education),IFSA Collaborative Innovation Center,Shanghai Jiao Tong University,Shanghai 200240,China

出　　处：《Chinese Optics Letters》2022年第3期95-100,共6页中国光学快报（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China(Nos.61125503,61235009,and 61801520);the Foundation for Development of Science and Technology of Shanghai(No.13]C1408300);the Natural Science Foundation of Hunan Province(Nos.2019JJ50756 and 2018JJ3521);the Scientific Research Project of Hunan Province Education Department(No.20B144).

摘　　要：When two synchronized laser beams illuminate the inner surface of bulk lithium niobate crystals with magnesium doping(5%/mol MgO:LiNbO_(3))under the condition of total reflection,semi-degenerate four-wave mixing(FWM)is generated.On this basis,a more sophisticated frequency conversion process on the interface of nonlinear crystal has been researched.The generation mechanism of FWM is associated with the fundamental waves reflected on the inner surface of the nonlinear crystal.Analysis of the phase-matching mechanism confirms that the FWM is radiated by the third-order nonlinear polarized waves,which are stimulated by the third-order nonlinear susceptibility coefficient of the nonlinear crystal.Theoretically calculated and experimentally measured corresponding data have been presented in this article.These results are expected to provide new inspiration for further experimental and theoretical research on frequency conversion in nonlinear crystals.

关 键 词：nonlinear optics four-wave mixing surface of nonlinear crystals third-order nonlinear coefficient 

分 类 号：TQ131.11[化学工程—无机化工] O437[机械工程—光学工程]