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  • Title: Bilayer dispersion-flattened waveguides with four zero-dispersion wavelengths.
    Author: Guo Y, Jafari Z, Agarwal AM, Kimerling LC, Li G, Michel J, Zhang L.
    Journal: Opt Lett; 2016 Nov 01; 41(21):4939-4942. PubMed ID: 27805655.
    Abstract:
    We propose a new type of bilayer dispersion-flattened waveguides that have four zero-dispersion wavelengths. Low and flat dispersion can be achieved by using two different material combinations, with a much smaller index contrast as compared to the previously proposed slot-assisted dispersion-flattened waveguides. Without using a nano-slot, dispersion becomes less sensitive to waveguide dimensions, which is highly desirable for high-yield device fabrication. Ultra-low dispersion, high nonlinearity, and fabrication-friendly design would make it promising for practical implementation of nonlinear photonic functions. The proposed waveguide configuration deepens our understanding of the dispersion flattening principle.
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