Patent ID: 11933940
Assignee: IMAGIA, INC.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An optical system, comprising:
a waveguide;
an optical source to generate optical radiation incident on a first face of the waveguide at an angle of incidence at which the optical radiation passes through the waveguide and out of a second face of the waveguide that is opposite the first face of the waveguide; and
a metasurface on the second face of the waveguide to receive the optical radiation that passes through the waveguide from the optical source, wherein the metasurface is operable to reflect the optical radiation back into the waveguide at an angle greater than a critical angle for total internal reflection within the waveguide, such that the optical radiation is conveyed along a length of the waveguide,
wherein the metasurface comprises a one-dimensional array of hydrogenated silicon-based ridges that extend along a dimension perpendicular to the length of the waveguide.