Presentation Information
[10p-E201-9]The effect of Fabry–Perot resonance to electromagnetic enhancement factors at the junctions between silver nanowires and nanoparticles
〇Tamitake Itoh1, Yuko S. Yamamoto2 (1.AIST, 2.JAIST)
Keywords:
Fabry Perot resonance,ultrafast surface enhanced fluorescence,surface plasmon
In the nanometer gap between gold or silver nanoparticles (NPs) and nanowires (NWs), electromagnetic (EM) coupling between the localized plasmons (LPs) of the NPs and the surface plasmons (SPs) of the NWs couple generates regions showing high-intensity EM field known as "hotspots" (HS). Within the HS of NP-dimer gaps, cavity quantum electrodynamic phenomena occur, such as surface-enhanced Raman scattering (SERS) and strong coupling between molecular excitons and coupled LPs. In the case of HS formed by NPs and NWs, the contribution of SPs complicates the nature of the EM enhancement; therefore, caution is required when interpreting experimentally obtained SERS spectra. In this study, we report the influence of Fabry–Pérot (FP) resonance on the EM enhancement factor at HS by analyzing the ultrafast surface-enhanced fluorescence (ultrafast SEF) emitted from dyes at the HS.