Setzpfandt, FrankNeshev, DragomirSchiek, RolandPertsch, ThomasSukhorukov, AndreyKivshar, Yuri2015-12-13December 59780977565764http://hdl.handle.net/1885/83887We study two-color parametric nonlinear modes in waveguide arrays with quadratic nonlinear response. We predict theoretically and observe experimentally a new type of phase transition in nonlinear lattices accompanied by an abrupt power-controlled changeKeywords: Discrete systems; Lithium Niobate Waveguide; Non-linear response; Nonlinear lattices; Nonlinear mode; Nonlinear waves; Parametric interactions; Staggered modes; Two-color; Waveguide array; Lithium; Niobium compounds; Optical fibers; Waveguides; Phase tran nonlinear dynamics; parametric interactions20102016-02-24