title: Two-color discrete localized modes and resonant scattering in arrays of nonlinear quadratic optical waveguides.
abstract: We analyze the properties and stability of two-color discrete localized modes in arrays of channel waveguides where tunable quadratic nonlinearity is introduced as a nonlinear defect by periodic poling of a single waveguide in the array. We show that, depending on the value of the phase mismatch and the input power, such two-color defect modes can be realized in three different localized states. We also study resonant light scattering in the arrays with the defect waveguide.
authors.affiliation: Departamento de Física, Facultad de Ciencias, Universidad de Chile, Casilla 653, Santiago, Chile.
authors.forename: Mario I
authors.initials: MI
authors.lastname: Molina
authors.forename: Rodrigo A
authors.initials: RA
authors.lastname: Vicencio
authors.forename: Yuri S
authors.initials: YS
authors.lastname: Kivshar