Figure 6
(a) The evolution of plasmon dispersion with size, where all plasmons are excited by Vex = lx + ly(scatter symbols), all clusters are square in shape and are the same in electron density ne = 8 × 1018/m2; (b) The dispersion of plasmons that excited by Vex = lx + ly (scatter symbols) for different electron density, where the cluster size is fixed to be 12 × 12, and γ = 3 eV. The electron density of the classical dispersion(continuous curves) equals the one of nearby scatter symbol.
