Efficient second and third harmonic generation in dual-layer lithium niobate microdisk resonator  

作　　者：Zhenzhong Hao Xiao Wu Qiang Luo Zhang Li Rui Ma Fang Bo Feng Gao Guoquan Zhang Jingjun Xu 

机构地区：[1]MOE Key Laboratory of Weak-Light Nonlinear Photonics,TEDA Institute of Applied Physics and School of Physics,Nankai University,Tianjin 300457,China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2024年第5期33-38,共6页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Key Research and Development Program of China(Grant No.2019YFA0705000);the National Natural Science Foundation of China(Grant Nos.12034010,12134007,11734009,92050111,12074199,92050114,and 12004197);the 111 Project(Grant No.B23045)。

摘　　要：Lithium niobate thin film frequency doubler has extensive applications in the preparation of classical and quantum sources.In this study,we successfully fabricated microdisk resonators with a quality factor of 2.2×10^(5) in reverse-polarization dual-layer x-cut lithium niobate for the first time.Based on the modal phase matching condition,efficient second harmonic generation with a record normalized conversion efficiency of~56000%W-1 and cascaded third harmonic generation with an efficiency of~6500%W-2 were obtained in the microdisk resonator.Compared with the periodically poled lithium niobate microcavity,the complex domain structure preparation processes are avoided.Our work provides a scheme for achieving highly efficient second-order nonlinear effects in non-periodically poled microcavities.

关 键 词：HARMONIC LITHIUM NIOBATE 

分 类 号：TN751.2[电子电信—电路与系统]