▎ 摘　　要

Our theoretical studies of inelastic light scattering from few-electron graphene quantum dots indicate that the electronic Raman spectrum is governed both by the inter-electron Coulomb interaction and single-particle excitations. The spectral features depend on the number of electrons in the quantum dot (QD) and importantly, on the valley polarization. A closed-shell QD shows different properties in polarized and depolarized geometries. The intensity of the polarized Raman peaks is suppressed for closed-shell systems. We also show how Raman spectroscopy in graphene quantum dots can probe both single-particle and collective many-particle charge-density-type excitations. Copyright (C) EPLA, 2011