Production of surface plasmons in electron emission from Al nanoparticles

•We use the Hamiltonian model to describe the plasmon surface modes in a sphere.•The plasmon angular frequencies do not depend on the wavenumber k.•The plasmon production increases as the e-hole pair approaches to the surface.•It is not possible to distinguish between extrinsic and intrinsic contributions.

In this work we study the surface plasmon generation by a suddenly created electron-hole pair in nanoparticles of spherical shape. We use a previously developed model based on the Hamiltonian formulation for plasmon field.