nl400636z_si_001.pdf (920.62 kB)
Augmenting Second Harmonic Generation Using Fano Resonances in Plasmonic Systems
journal contribution
posted on 2013-04-10, 00:00 authored by Krishnan Thyagarajan, Jérémy Butet, Olivier J. F. MartinSignificant
augmentation of second harmonic generation using Fano resonances in
plasmonic heptamers made of silver is theoretically and experimentally
demonstrated. The geometry is engineered to simultaneously produce
a Fano resonance at the fundamental wavelength, resulting in a strong
localization of the fundamental field close to the system, and a higher
order scattering peak at the second harmonic wavelength. These results
illustrate the versatility of Fano resonant structures to engineer
specific optical responses both in the linear and nonlinear regimes
thus paving the way for future investigations on the role of dark
modes in nonlinear and quantum optics.