Plasmon-assisted photoelectron emission in a model cluster using time-dependent density-functional theory and the time-dependent surface-flux method
Phys. Rev. A 113, 013102 – Published 2 January, 2026
DOI: https://doi.org/10.1103/vg5z-4m34
Abstract
We investigate plasmon-assisted photoelectron emission using a one-dimensional time-dependent density-functional theory model. The plasmons are excited nonlinearly by three laser photons. Photoelectron spectra are computed with the time-dependent surface-flux method. In addition to the expected above-threshold ionization comb, we observe peaks that arise from long-lived plasmon oscillations and the associated electron emission occurring after the laser pulse. We further analyze the positions of these peaks and their scaling behavior with the laser intensity.
