Grating Couplers

Grating couplers are optical devices used to transfer light between different mediums, like from a fiber optic cable to a photonic chip. They work by using a series of finely spaced grooves or "gratings" that diffract light at specific angles. When light hits these gratings, they help to redirect and couple the light efficiently into or out of the fiber or chip, enabling communication or processing of information. This technology is crucial in advancing optical communications and miniaturized photonic systems by improving how light is guided in integrated circuits.