Observation of dynamic localization in periodically-curved waveguide   arrays
  We report on a direct experimental observation of dynamic localization (DL) of light in sinusoidally-curved 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 [D.H. Dunlap and V.M. Kenkre, Phys. Rev. B 34, 3625 (1986)]. The theoretical condition for DL in a sinusoidal field is experimentally demonstrated. 
S. Longhi, M. Marangoni, M. Lobino, R. Ramponi, P. Laporta, E. Cianci,   and V. Foglietti