title: Fano resonances in waveguide arrays with saturable nonlinearity.
abstract: We study a waveguide array with an embedded nonlinear saturable impurity. We solve the impurity problem in closed form and find the nonlinear localized modes. Next, we consider the scattering of a small-amplitude plane wave by a nonlinear impurity mode, and discover regions in parameter space where transmission is fully suppressed. We relate these findings with Fano resonances and propose this setup as a means to control the transport of light across the array.
authors.affiliation: Departamento de Física, Facultad de Ciencias, and Centro de Optica y Fotónica (CEFOP), Universidad de Chile, Casilla 653, Santiago, Chile. unaether@u.chile.cl
authors.forename: Uta
authors.initials: U
authors.lastname: Naether
authors.forename: Daniel E
authors.initials: DE
authors.lastname: Rivas
authors.forename: Manuel A
authors.initials: MA
authors.lastname: Larenas
authors.forename: Mario I
authors.initials: MI
authors.lastname: Molina
authors.forename: Rodrigo A
authors.initials: RA
authors.lastname: Vicencio