Reduced second harmonic generation from closely spaced pairs of Au nanoparticles

Matthew D. McMahon; Davon Ferrara; Rene Lopez; Richard F. Haglund Jr.

doi:10.1117/12.683075

30 August 2006 Reduced second harmonic generation from closely spaced pairs of Au nanoparticles

Matthew D. McMahon, Davon Ferrara, Rene Lopez, Richard F. Haglund Jr.

Proceedings Volume 6323, Plasmonics: Metallic Nanostructures and their Optical Properties IV; 63230U (2006) https://doi.org/10.1117/12.683075
Event: SPIE Optics + Photonics, 2006, San Diego, California, United States

Abstract

Closely spaced pairs or "dimers" of elongated gold nanoparticles may be expected to exhibit electric field hotspots. We investigate the possible influence of hotspots on second harmonic generation. Preliminary results show that arrays of nanoparticle dimers exhibit reduced second-harmonic generation compared with arrays of single nanoparticles having similar extinction spectra, contradicting a simple model of second-harmonic generation (varying as the fourth power of the local fundamental field) if hotspots can be shown to exist in such gaps.

Citation Download Citation

Matthew D. McMahon, Davon Ferrara, Rene Lopez, and Richard F. Haglund Jr. "Reduced second harmonic generation from closely spaced pairs of Au nanoparticles", Proc. SPIE 6323, Plasmonics: Metallic Nanostructures and their Optical Properties IV, 63230U (30 August 2006); https://doi.org/10.1117/12.683075

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