Enhancement of second-harmonic generation from metal nanoparticles by passive elements

Robert Czaplicki, Hannu Husu, Roope Siikanen, Jouni Mäkitalo, Martti Kauranen, Janne Laukkanen, Joonas Lehtolahti, Markku Kuittinen

Research output: Contribution to journalArticleScientificpeer-review

104 Citations (Scopus)

Abstract

We prepare arrays of gold nanoparticles that include both noncentrosymmetric particles with a second-order nonlinear optical response (active particles) and centrosymmetric particles with no second-order response (passive particles). The plasmon resonances of the active and passive particles are at distinct wavelengths, yet the passive particles modify the electromagnetic modes of the structure in such a way that second-harmonic generation from the active particles is enhanced. Our results provide a completely new concept for optimizing the nonlinear responses of metamaterials.
Original languageEnglish
Article number093902
Number of pages5
JournalPhysical Review Letters
Volume110
Issue number9
DOIs
Publication statusPublished - 2013
MoE publication typeA1 Journal article-refereed

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