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    High-efficiency broadband grating out-coupler for thick silicon waveguides with a tuned SiGe layer

    High-efficiency broadband grating out-coupler for thick silicon waveguides with a tuned SiGe layer por Muntaha Sidra Tul, Doughan Isaac, Cherchi Matteo, Roussey Matthieu, Aalto Timo

    Publicado 2025-01-01

    We design a novel grating out-coupler while maintaining a Gaussian-shaped far-field output. The approach is based on the patterning of a grating in a SiGe layer on the top surface of a 3-μm-thick Si waveguide. The grating aims at coupling the guided signal into a beam vertically out from the surface...

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