Four-wave mixing in silicon-nanocrystal embedded high-index doped silica micro-ring resonator

作     者：Yuhua Li Xiang Wang Roy Davidson Brent E.Little Sai Tak Chu Yuhua Li;Xiang Wang;Roy Davidson;Brent E.Little;Sai Tak Chu

作者机构：Key Laboratory of Optical Field Manipulation of Zhejiang ProvinceDepartment of PhysicsZhejiang Sci-Tech UniversityHangzhou 310018China Department of PhysicsCity University of Hong KongHong Kong 999077China QXP Technology Inc.Xi’an 710119China State Key Laboratory of Transient Optics and PhotonicsXIOPMCASXi’an 710119China 

出 版 物：《Journal of Semiconductors》 (半导体学报（英文版）)

年 卷 期：2021年第42卷第4期

页      面：104-110页

核心收录：

学科分类：080904[工学-电磁场与微波技术] 0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：the Research Grants Council,University Grants Committee(GRF 11213618) the Strategic Priority Research Program of the Chinese Academy of Sciences(XDB24030300). 

主　　题：four-wave mixing silicon nanocrystal high-index doped silica micro-ring resonator 

摘      要：A nonlinear integrated optical platform that allows the fabrication of waveguide circuits with different material composition,and at small dimensions,offers advantages in terms of field enhancement and increased interaction length,thereby facilitating the observation of nonlinear optics effects at a much lower power level.To enhance the nonlinearity of the conventional waveguide structure,in this work,we propose and demonstrate a microstructured waveguide where silicon rich layer is embedded in the core of the conventional waveguide in order to increase its nonlinearity.By embedding a 20 nm thin film of silicon nanocrystal(Si-nc),we achieve a twofold increase of the nonlinear parameter,γ.The linear relationship between the fourwave mixing conversion efficiency and pump power reveals the negligible nonlinear absorption and small dispersion in the micro-ring resonators.This simple approach of embedding an ultra-thin Si-nc layer into conventional high-index doped silica dramatically increases its nonlinear performance,and could potentially find applications in all-optical processing functions.