Abstract
Phase-matched second harmonic generation by a surface-plasmon polariton was observed along a silver layer on a slab-type optical waveguide with a Q-switched neodymium:yttrium aluminum garnet laser (1.064 μm). A numerical analysis previous to the experiment was carried out by a perturbation method employing the conception of coupled modes between surface polariton waves and guided waves. In this case the slab-type optical waveguide played the role of an energy storage layer to realize a longer macroscopic propagation length.
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