title: Nonlinearity-induced broadening of resonances in dynamically modulated couplers.
abstract: We report the observation of nonlinearity-induced broadening of resonances in dynamically modulated directional couplers. When the refractive index of the guiding channels in the coupler is harmonically modulated along the propagation direction and is out-of-phase in two channels, coupling can be completely inhibited at resonant modulation frequencies. We observe that nonlinearity broadens such resonances and that localization can be achieved even in detuned systems at power levels well below those required in unmodulated couplers.
authors.affiliation: Physics Department and Solid State Institute, Technion, 32000 Haifa, Israel. szameit@iap.uni-jena.de
authors.forename: A
authors.initials: A
authors.lastname: Szameit
authors.forename: Y V
authors.initials: YV
authors.lastname: Kartashov
authors.forename: M
authors.initials: M
authors.lastname: Heinrich
authors.forename: F
authors.initials: F
authors.lastname: Dreisow
authors.forename: R
authors.initials: R
authors.lastname: Keil
authors.forename: S
authors.initials: S
authors.lastname: Nolte
authors.forename: A
authors.initials: A
authors.lastname: Tünnermann
authors.forename: V A
authors.initials: VA
authors.lastname: Vysloukh
authors.forename: F
authors.initials: F
authors.lastname: Lederer
authors.forename: L
authors.initials: L
authors.lastname: Torner