2019/01/28 by H. Susanto, N. Karjanto · 1 citation
Physics and Astronomy · #physics.optics #nlin.PS #msc:35Q55 #msc:35C08 #msc:78A60 #msc:78A50 #msc:35B32
paper · pdf · doi:10.1142/s0218863508004147
published as Journal of Nonlinear Optical Physics and Materials 17(2): 159-165, 2008 · 7 pages, 2 figures, presented at the 6th International Symposium on Modern Optics and Its Applications (ISMOA) 2007
arxiv created 2019/01/28 · arxiv updated 2019/01/29
In this work, we consider a semi-infinite discrete nonlinear Schrödinger equation with saturable nonlinearity driven at one edge by a driving force. The equation models the dynamics of coupled photorefractive waveguide arrays. It has been reported that when the frequency of the driving force is in the forbidden band, energy can be transmitted along the lattices provided that the driving amplitude is above a critical value. This nonlinear tunneling is called supratransmission. Here, we explain the source of supratransmission using geometric illustrations. Approximations to the critical amplitude for supratransmission are presented as well.