Observation of the gradual transition from one-dimensional to   two-dimensional Anderson localization
  We study the gradual transition from one-dimensional to two-dimensional Anderson localization upon transformation of the dimensionality of disordered waveguide arrays. An effective transition from one- to two-dimensional system is achieved by increasing the number of rows forming the arrays. We observe that, for a given disorder level, Anderson localization becomes weaker with increasing number of rows, hence the effective dimension. 
U. Naether, Y. V. Kartashov, V. A. Vysloukh, S. Nolte, A. Tunnermann,   L. Torner, A. Szameit
physics.optics nlin.PS