Abstract
A photon scanning tunneling microscope is employed to probe the surface-plasmon-induced local field enhancement effect on two-photon fluorescence from organic nanoparticles adsorbed on silver surface. A size dependence of fluorescence enhancement and photodecomposition is observed, which results from the competition between the surface-plasmon-enhanced two-photon fluorescence and the nonradiative energy transfer from the excited dye molecules to the silver surface.
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