Planar optical metalenses and optical connectors comprising same

Abstract

An optical metalens includes a planar substrate, a plurality of nanostructures extending from a surface of the planar substrate, and a cladding extending from the surface of the planar substrate and encompassing the plurality of nanostructures. A cladding thickness is greater than the nanostructure height of each nanostructure of the plurality of nanostructures and a planar cladding surface opposite the planar substrate. The cladding thickness and at least one of a nanostructure dimension and a nanostructure height of each nanostructure of the plurality of nanostructures are configured such that the optical metalens imparts a target phase to light passing through the optical metalens and the optical metalens includes a transmittance greater than or equal to

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