2013/12/18 by Th. Keil, D. Bauer
Chemistry · Physics and Astronomy · #Atomic physics #Cluster (spacecraft) #Computational physics #Coulomb #Electron #Field (mathematics) #Ion #Ionization #Kinetic energy #Laser #Laser-Matter Interactions and Applications #Laser-Plasma Interactions and Diagnostics #Mass Spectrometry Techniques and Applications #Photoelectric effect #Physics #Quantum mechanics #Spectral line #physics.atm-clus #physics.atom-ph #quant-ph
paper · pdf · doi:10.1088/0953-4075/47/12/124029
published as J. Phys. B 47, 124029 (2014) · 15 pages, 7 figures, IOP style
arxiv created 2013/12/18 · openalex publication_date 2014/06/10 · arxiv updated 2017/11/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The strong field approximation (SFA) formulated in terms of so-called "quantum orbits" led to much insight into intense-laser driven ionization dynamics. In plain SFA, the emitted electron is treated as a free electron in the laser field alone. However, with improving experimental techniques and more advanced numerical simulations it becomes more and more obvious that the plain SFA misses interesting effects even on a qualitative level. Examples are holographic side lobes, the low-energy structure, radial patterns in photoelectron spectra at low kinetic energies, and strongly rotated angular distributions. For this reason increasing effort has been recently devoted to Coulomb corrections of the SFA. In the current paper, we follow a similar line but consider ionization of metal clusters. It is known that photoelectrons from clusters can be much more energetic than those emitted from atoms or small molecules, especially if the Mie resonance of the expanding cluster is evoked. We develop a SFA that takes the collective field inside the cluster via the simple rigid-sphere model into account. Our approach is based on field-corrected quantum orbits so that the acceleration process (or any other spectral feature of interest) can be investigated in detail.