Silicon Add-Drop Filter Based on Multimode Bragg Sidewall Gratings and Adiabatic Couplers


A silicon photonic add-drop filter is demonstrated with sidewall Bragg gratings in a multimode strip waveguide. The operating principle is based on the contradirectional coupling between the TE0 mode and different higher-order modes inside the multimode waveguide, which depends on the symmetry property of the periodic refractive-index perturbations. In… (More)

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