Modification of Point-Spread Function in Confocal Microscopy by Nonlinear Plasmonic Light Scattering

Recently, we reported that the localized surface plasmon resonance (LSPR) could strongly affect to the nonlinear light scattering from a single gold nanoparticle. The saturation and reverse satiation effect of light scattering were observed under the laser irradiation at the resonance [1, 2], but not under the off-resonance conditions.