Figure 6: The time-dependent results for the nanocluster with a modified electronic structure.
From: Interplay between plasmon and single-particle excitations in a metal nanocluster
In this system, the single-particle d to s transitions resonant to the plasmon frequency do not exist. (a) The dipole moment exhibits a Rabi oscillation, and the amplitude of the dipole moment hardly decays. (b) The number of excited electrons ΔOj(t) also exhibits Rabi oscillations, and the major single-particle excitations are slightly off-resonant. (c) The energies stored in the plasmon mode and single-particle excitations exhibit similar Rabi oscillations. The energy is transferred back and forth between the plasmon and single-particle excitations, and the average energies stored in the plasmon and single-particle excitations do not change significantly with time. (d) The charge density difference Δρ at time t as labelled in a, which corresponds to the local maximum or local minimum of the dipole moment. When more energy is stored in the plasmon mode (19.2 and 19.8 fs), there are significant charge sloshings on the surface; however, when more energy is stored in the single-particle excitations (41.4 and 42.0 fs), there are less charge sloshings on the surface.
