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  • Title: Optimal geometry of nonlinear silicon slot waveguides accounting for the effect of waveguide losses.
    Author: Ong JR, Chen VH.
    Journal: Opt Express; 2015 Dec 28; 23(26):33622-33. PubMed ID: 26832026.
    Abstract:
    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.
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