Observation of Dynamic Localization in Periodically Curved Waveguide Arrays

We report on a direct experimental observation of dynamic localization (DL) of light in sinusoidallycurved lithium-niobate waveguide arrays which provides the optical analog of DL for electrons in periodic potentials subjected to ac electric fields as originally proposed by Dunlap and Kenkre [Phys. Rev. B 34, 3625 (1986)]. The theoretical condition for DL in a sinusoidal field is experimentally demonstrated.