Metasurface on silicon photonics for beam steering and focusing

We demonstrate a platform of metasurface on silicon photonics to exploit both the guided and radiative modes. We report examples including waveguide-fed metalenses, mode size converters for millimeter-size emission, and compact 2D beam steerers. OCIS codes: (130.3120) Integrated optics devices; (250.5300) Photonic integrated circuits.