Fano resonances in waveguide arrays with saturable nonlinearity.
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.
Naether
Uta
U
Departamento de Física, Facultad de Ciencias, and Centro de Optica y Fotónica (CEFOP), Universidad de Chile, Casilla 653, Santiago, Chile. unaether@u.chile.cl
Rivas
Daniel E
DE
Larenas
Manuel A
MA
Molina
Mario I
MI
Vicencio
Rodrigo A
RA