• Optical response of metal nanoparticles governed by Mie-plasmons
• STM-luminescence spectroscopy enables determination of plasmon energies for a single particle as function of size, shape and chemical composition

Plasmons in single Ag particles

• Controlled stimulation of horizontal and vertical plasmon modes for different tip positions above the particle

Topography and luminescence maps of a single silver particle measured at different bias conditions

For details: Myrach et al. Phys. Rev. B 83 (2011) 035416.

Size-dependent plasmon response from single Ag particles

• Blue shifted silver plasmon with decreasing particle size
• Assigned to reduced screening of plasmon mode at particle surface

STM luminescece from Ag particles labeled in the inset (30×30 mm²)

For details: Nilius et al. Phys. Rev. Lett. 84 (2000) 3994.