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The authors report on the ultrafast modulation of propagating fs SPP signal via direct optical excitation of the metal component of an aluminium/silica waveguide and investigate spectral dependence of the effect and its kinetics. The authors also analyse numerically the nonlinear SPP pulse propagation regimes, including self-focusing, pulse compression and solitons, supported by the nonlinearity of...
Summary form only given. We discuss a means of achieving a large optical nonlinearity in a material on the verge of a transition between structural phases with significantly different optical properties. We have found that films of gallium deposited on fused silica by ultrafast pulsed laser ablation show a fully reversible, surface-assisted metallization when approaching the transition from the /spl...
Summary form only given. Recently, a new type of very fast femtosecond incoherent frequency-degenerate optical nonlinearity has been reported in bulk metallic gold. This encouraged us to examine the potential application of metals as nonlinear media in optical autocorrelators. Below we describe the use of metal nonlinearity in an autocorrelator, which offers the potential for femtosecond pulse-length...
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