We report what we believe is the first observation of all-optical switching in a nonlinear periodic-waveguide structure. Measurements on the silicon-on-insulator waveguides were taken at 1.064 μm and at energies ranging from 1 to 18 μJ/pulse using a Nd:YAG pulsed laser. The measurements confirm theoretical predictions of bistability at low intensities with unstable dynamics at higher pulse energies.
An experimental and numerical study of nonlinear dynamical effects is presented using a corrugated silicon-on-insulator waveguide as a model structure. The advantages of the material used and the fabrication of the grating structures are discussed. The dynamics studied include optical bistability, optical switching at low intensities, and unstable behavior at higher pulse energies. The effects of both the free-carrier decay and lattice heating on the dynamics are assessed.
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