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Efficient nonlinear metasurfaces by using multiresonant high-Q plasmonic arrays

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Details

Original languageEnglish
Pages (from-to)E30-E35
JournalJournal of the Optical Society of America B: Optical Physics
Volume36
Issue number7
DOIs
Publication statusPublished - 2019
Publication typeA1 Journal article-refereed

Abstract

We numerically investigate second-harmonic generation from multiresonant plasmonic metasurfaces by designing an array consisting of L-shaped aluminum nanoparticles that simultaneously supports two surface lattice resonances with relatively high quality factors (>100). Using an approach based on the nonlinear discrete-dipole approximation, we predict an over million-fold enhancement of the emitted second-harmonic intensity from a particle at the center of the metasurface compared to an individual particle and estimate that conversion efficiencies of around 10-5 could be achievable from the surface. Our results are an important step towards making nonlinear metasurfaces practical for nonlinear applications, such as for frequency conversion.

Publication forum classification

Field of science, Statistics Finland