Enhanced second harmonic generation from coupled asymmetric plasmonic metal nanostructures

TitleEnhanced second harmonic generation from coupled asymmetric plasmonic metal nanostructures
Publication TypeJournal Article
Year of Publication2015
AuthorsYildiz, B, Tasgin, MEmre, Abak, MKurtulus, Coskun, S, Unalan, HEmrah, Bek, A
JournalJournal of Optics
Volume17
Issue12
Pagination125005
Date Published2015/12//
Abstract

We experimentally demonstrate that two coupled metal nanostructures (MNSs), a silver nanowire and bipyramid, can produce similar to 30 times enhanced second harmonic generation compared to the particles alone. We develop a simple theoretical model, presenting the path interference effects in the nonlinear response of coupled MNSs. We show that the reason for such an enhancement can be the occurrence of a Fano resonance due to the coupling of the converter MNS to the long-lived mode of the attached MNS.