Silencing the second harmonic generation from plasmonic nanodimers: A comprehensive discussion

• Jérémy Butet,
• Gabriel D. Bernasconi and
• Olivier J. F. Martin

Beilstein J. Nanotechnol. 2018, 9, 2674–2683, doi:10.3762/bjnano.9.250

• the pump wavelength and results in a dipolar second harmonic emission. Keywords: gold; nanoantennas; nonlinear plasmonics; second harmonic generation; surface integral equation method; Introduction Due to their high density of free electrons, plasmonic nanostructures offer the possibility to

• nonlinear nanocrystals [10][11][12], has been taken up, enabling a strong control of light–matter interaction in these hybrid nanostructures. At the same time, it was proposed to use nanoantennas for the observation of nonlinear optical processes at the nanoscale [13]. The basic idea in nonlinear plasmonics

• well-known and has been reported in various publications – it has been established, as a cornerstone of nonlinear plasmonics, that the nonlinear optical responses of plasmonic nanostructures is boosted by LSPRs [31][32]. Indeed, a strong near-field enhancement is associated with the collective