Second harmonic generation enhanced by local surface plasmon resonance

Kazuma Tsuboi; Kotaro Kajikawa

doi:10.1117/12.616212

18 August 2005 Second harmonic generation enhanced by local surface plasmon resonance

Kazuma Tsuboi, Kotaro Kajikawa

Proceedings Volume 5928, Plasmonic Nano-imaging and Nanofabrication; 59280P (2005) https://doi.org/10.1117/12.616212
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

Abstract

We have found that spherical gold nanoparticles immobilized on a gold substrate with a gap of a few nanometers, which is supported by self-assembled monolayers, show large activity of second-harmonic generation (SHG). Spectroscopic SHG measurements were performed with a Ti:Sa laser in order to investigate the origin of the intense SHG. It was found that the SHG intensity increases with shorter wavelength region, indicating that the enhancement originates from localized surface plasmon resonance in the system. We also fabricated microarrays of the surface immobilized gold nanoparticles through photoregistration of the self-assembled monolayers used to support the nanogap. The nanoparticle microarrays were characterized by SHG microscopy. The microarrays can be applied to multichannel biological sensors using linear optical spectroscopy.

Citation Download Citation

Kazuma Tsuboi and Kotaro Kajikawa "Second harmonic generation enhanced by local surface plasmon resonance", Proc. SPIE 5928, Plasmonic Nano-imaging and Nanofabrication, 59280P (18 August 2005); https://doi.org/10.1117/12.616212

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