摘要
Here we propose a hybrid polymer-LN waveguide for achieving phase-matched second-harmonic generation(SHG).From the aspect of super-mode theory,the geometric parameters of the hybrid semi-nonlinear waveguide were optimized to utilize both symmetric(even)and antisymmetric(odd)modes of the pump and SHG waves so as to facilitate phase matching with large modal overlap.Phase matching between a fundamental even(TE_(00)-like)mode at 1320 nm and a fundamental odd(TE_(01)-like)mode at 660 nm was found with a calculated modal overlap integral of 0.299,while utilizing the largest nonlinear coefficient d_(33),and achieving an efficient calculated normalized conversion efficiency of 148%W^(-1)·cm^(-2).Considering the fabrication feasibility of such hybrid waveguide with features including etchless,large dimension,and low structural sensitivity,we believe our findings would provide a useful reference for future on-chip efficient nonlinear conversion devices.
作者
Zijie Wang
Bodong Liu
Chunhua Wang
Huakang Yu
王梓杰;刘伯东;王春华;虞华康(School of Physics and Optoelectronics,South China University of Technology,Guangzhou 510641,China;School of Electrical Engineering and Intelligentization,Dongguan University of Technology,Dongguan 523808,China;China–Singapore International Joint Research Institute,Guangzhou Knowledge City,Guangzhou 510663,China)
基金
Project supported by the National Natural Science Foundation of China(Grant Nos.91850107 and 12174116)
the National Key Research and Development Program of China(Grant No.2018YFA0306200)
Guangdong Innovative and Entrepreneurial Research Team Program(Grant No.2016ZT06C594)
the Key Program of Guangzhou Scientific Research Special Project(Grant No.201904020013)
the Science and Technology Project of Guangdong Province,China(Grant No.2020B010190001)
the Fundamental Research Funds for the Central Universities。
作者简介
Corresponding author:王春华.E-mail:wangch0515@163.com;Corresponding author:虞华康.E-mail:hkyu@scut.edu.cn。
