High-Q titanium dioxide micro-ring resonators for integrated nonlinear photonics

Meicheng Fu, Yi Zheng, Gaoyuan Li, Hao Hu, Minhao Pu, Leif Katsuo Oxenløwe, Lars Hagedorn Frandsen, Xiujian Li, Xiaowei Guan

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We report on the nonlinear characterizations of the titanium dioxide micro-ring resonators (TiO2 MRRs). By utilizing optimized fabrication processes, high quality factors (Q∼1.4 × 105) doubling that of the previous work are achieved here for TiO2 MRRs with high-confinement TiO2 waveguides. The four-wave mixing (FWM) experiment results with low and high signal power demonstrate that, the fabricated TiO2 MRRs can perform broadband (∼40 nm) wavelength conversion and cascaded FWMs. These achievements pave the way for key nonlinear photonic applications with TiO2 waveguides and provide an efficient platform for various integrated photonic devices.
Original languageEnglish
JournalOptics Express
Issue number26
Pages (from-to)39084-39092
Publication statusPublished - 2020


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