Figure 4

Time evolution of the spontaneous decay rate of a QD placed in the vicinity of a (16, 14) nm nanoshell. (a) Γ₂₁(t), Γ₂₃(t) when the QD is placed at a distance 4 nm from the MNP. (b) Γ₂₁(t) for different values of the QD-MNP separation distance (h). The inset in (a) represents the long-time relaxation behavior of Γ₂₃(t)/Γ₀ and in (b) shows Γ₂₁(t)/Γ₀ for h = 20 nm. Here, the permittivities of the core and the embedding medium are assumed to be equal, ε_c = ε_b = 10.95.