Plasmon modes in light emission from silver nanoparticles induced by a scanning tunneling microscope

This paper deals with light emission induced by a scanning tunneling microscope using a silver nanoparticles film as a sample. We measured both two photon maps of different spectral ranges along with a topography and light emission spectra corresponding to different spots of the samples. The spectra revealed two distinct peaks, corresponding to different-order tip-induced plasmon modes of the tunneling junction.