All-optical diode based on second-harmonic generation in an asymmetric waveguide

K. Gallo and G. Assanto

J. Opt. Soc. Am. B 16, 267-269 (1999)


We numerically investigate the response of a quadratically nonlinear channel waveguide for second harmonic generation, in which the insertion of a localized phase-discontinuity allows the simple implementation of directional non-reciprocity in the fundamental frequency transmission.