[18p-A33-1~19] 3.11 Nanoscale optical science and near-field optics

1:30 PM - 1:45 PM JST(4:30 AM - 4:45 AM UTC)

[18p-A33-3] Generation of two-photon excited emission from junctions between silver nanowires and nanoparticles

〇Tamitake Itoh¹, Yuko S. Yamamoto² (1.AIST, 2.JAIST)

Keywords:

plasmon resonance,surface enhanced two-photon excited emission,silver nanowire

Electric field regions enhanced by plasmon resonance as referred as hot spots (HSs) exist in the nanometer gaps of dimers composed of gold or silver nanoparticles (NPs) and nanowires (NWs). In HSs, nonlinear optical effects occur with excitation of continuous wave (cw) light. This is the advantageous due to enabling nonlinear spectroscopy with high wavelength resolution compared to conventional pulsed laser light excitation. In this study, we report a phenomenon in which enhanced two-photon excitation emissions, such as hyper-Rayleigh scattering, hyper-Raman scattering, and two-photon fluorescence of rhodamine dye, are generated from HSs formed at the contact points between NWs and NPs with excitation of near-infrared (NIR) cw light.