Abstract
A novel silicon waveguide structure is proposed that provides simultaneous dispersion engineering for both transverseelectric (TE) and transverse-magnetic (TM) modes. There is a dispersion of approximately ± 250 ps/(nm·km) over a 1404-nm and a 904-nm bandwidth for the fundamental quasi-TM and quasi-TE modes, respectively. The nonlinear parameters of the modes and the group velocity mismatch are also studied for an optimum structure. It is explained that mode coupling is feasible before the temporal separation of the modes occurs and that it can be enhanced due to the reduced dispersion of the modes. Enhanced mode coupling and the different dispersion properties of the modes can be utilized for enriching and controlling nonlinear effects. Therefore, this waveguide can ensure efficient implementation of photonic functions based on polarization effects.
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