Patent 11803016 was granted and assigned to GlobalFoundries on October, 2023 by the United States Patent and Trademark Office.
Structures for an edge coupler and methods of fabricating such structures. The structure includes a substrate, a waveguide core, and a metamaterial layer positioned in a vertical direction between the substrate and the waveguide core. The metamaterial layer includes a plurality of elements separated by a plurality of gaps and a dielectric material in the plurality of gaps.