Abstract
Vertical slot waveguide micro-ring resonators in silicon photonics have already been demonstrated in previous works and applied to several schemes, including sensing and hybrid nonlinear optics. Their performances, first quantified by the reachable -factors, are still perceived to be restrained by larger intrinsic propagation losses than those suffered by simple Si wire waveguides. In this Letter, the optical loss mechanisms of slot waveguide micro-ring resonators are thoroughly investigated with a special focus on the coupler loss contribution that turns out to be the key obstacle to achieving high -factors. By engineering the coupler design, slotted ring resonators with a 50 μm radius are experienced with a loaded -factor up to 10 times improvement from to . The intrinsic losses due to the light propagation in the bent slot ring itself are proved to be as low as at . These investigations of slot ring resonators open high performance potentials for on-chip nonlinear optical processing or sensing in hybrid silicon photonics.
© 2015 Optical Society of America
Full Article | PDF ArticleMore Like This
Zheng Wang, Xiaochuan Xu, Donglei Fan, Yaguo Wang, and Ray T. Chen
Opt. Lett. 41(14) 3375-3378 (2016)
Xi Wu, Tianren Fan, Ali A. Eftekhar, Amir H. Hosseinnia, and Ali Adibi
Opt. Lett. 46(17) 4316-4319 (2021)
L. Stefan, M. Bernard, R. Guider, G. Pucker, L. Pavesi, and M. Ghulinyan
Opt. Lett. 40(14) 3316-3319 (2015)