JOURNAL OF OPTICS, vol.17, 2015 (SCI-Expanded)
Article / Article
JOURNAL OF OPTICS
Science Citation Index Expanded (SCI-EXPANDED), Scopus
Fano resonance, second harmonic generation, plasmons, nonlinear optics, enhancement, INDUCED TRANSPARENCY, FANO RESONANCES, NANOPARTICLES, METAMATERIALS, SYSTEMS, FUTURE, SILVER
Middle East Technical University Affiliated:
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.