Size-dependent surface plasmon dynamics in metal nanoparticles

Academic Article

Abstract

  • We study the effect of Coulomb correlations on the ultrafast optical dynamics of small metal particles. We demonstrate that a surface-induced dynamical screening of the electron-electron interactions leads to quasiparticle scattering with collective surface excitations. In noble-metal nanoparticles, it results in an interband resonant scattering of d holes with surface plasmons. We show that this size-dependent many-body effect manifests itself in the differential absorption dynamics for frequencies close to the surface plasmon resonance. In particular, our self-consistent calculations reveal a strong frequency dependence of the relaxation, in agreement with recent femtosecond pump-probe experiments. © 1998 American Physical Society.
  • Authors

    Published In

    Digital Object Identifier (doi)

    Author List

  • Shahbazyan TV; Perakis IE; Bigot JY
  • Start Page

  • 3120
  • End Page

  • 3123
  • Volume

  • 81
  • Issue

  • 15