title: Photothermal nonlinearity and optical bistability in a graphene-silicon waveguide resonator.
abstract: We report observation of optical bistability and enhanced thermal nonlinearity in a graphene-silicon waveguide resonator. Photo-induced Joule heating in the graphene layer gives rise to a temperature increase in the silicon waveguide core and a corresponding thermo-optic shift in the resonance of the Fabry-Perot resonator. Measurement of the nonlinear resonance spectra showed a 9-fold increase in the effective thermal nonlinear index due to the graphene layer compared with a bare silicon waveguide.
authors.forename: Cameron
authors.initials: C
authors.lastname: Horvath
authors.forename: Daniel
authors.initials: D
authors.lastname: Bachman
authors.forename: Rob
authors.initials: R
authors.lastname: Indoe
authors.forename: Vien
authors.initials: V
authors.lastname: Van