METHOD AND STRUCTURE FOR COUPLING LIGHT INTO A WAVEGUIDE COMPRISING NANO - SIZED SCATTERING ELEMENTS

摘要

A method and structure for coupling light into a waveguide (501, 502). The method comprises the steps of providing nano- sized or sub-micron scattering elements in a coupling spot (503) disposed in a plane of a waveguide core (501) of the waveguide; directing the light (504) into the coupling spot; and subjecting the light to scattering at the scattering elements such that at least a portion of the scattered light is coupled into the waveguide core (501).