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We present our recent findings on anomalous and enhanced nonlinear effects available in plasmonic nanoparticles and metamaterials. The large field enhancement in the vicinity of individual and collections of plasmonic nanoparticles ensures a significant boosting of nonlinear optical effects, which may be exploited in several exciting applications, in particular when combined with the exotic light interaction of plasmonic materials and metamaterials. We propose various setups in which these nonlinear effects may open exciting new venues for applications.

metamaterials, plasmonics, nonlinear optics