Open AccessOptimal geometry of nonlinear silicon slot waveguides accounting for the effect of waveguide losses
Author(s) -
Jun Rong Ong,
Valerian H. Chen
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.033622
Subject(s) - optics , waveguide , figure of merit , context (archaeology) , nonlinear system , materials science , nonlinear optics , silicon , scattering , asymmetry , slot waveguide , physics , silicon photonics , optoelectronics , photonics , paleontology , laser , quantum mechanics , biology
The optimal geometry of silicon-organic hybrid slot waveguides is investigated in the context of the efficiency of four-wave mixing (FWM), a χ(3) nonlinear optical process. We study the effect of slot and waveguide widths, as well as waveguide asymmetry on the two-photon absorption (TPA) figure of merit and the roughness scattering loss. The optimal waveguide core width is shown to be 220nm (symmetric) with a slot width of 120nm, at a fixed waveguide height of 220nm. We also show that state-of-the-art slot waveguides can outperform rib waveguides, especially at high powers, due to the high TPA figure-of-merit.