2017/02/12 by F. Cajiao Vélez, F Cajiao Vélez, J. Z. Kamiński +3
Physics and Astronomy · #Attosecond #Diffraction #Electron #Ionization #Laser #Laser-Matter Interactions and Applications #Laser-Plasma Interactions and Diagnostics #Orbital Angular Momentum in Optics #Photoionization #Supercontinuum #Ultrashort pulse #physics.atom-ph
paper · pdf · doi:10.1088/1361-6455/aaa056
published as J. Phys. B: At. Mol. Opt. Phys. 51, 055601 (2018) · 13 pages, 9 figures
arxiv created 2017/02/12 · openalex created_date 2017/06/05 · openalex publication_date 2017/12/08 · arxiv updated 2018/03/14 · openalex updated_date 2026/08/05
Abstract Ionization by relativistically intense short laser pulses is studied in the framework of strong-field quantum electrodynamics. Distinctive patterns are found in the energy probability distributions of photoelectrons, which are sensitive to the properties of a driving laser field. It is demonstrated that these electrons are generated in the form of solitary attosecond wave packets. This is particularly important in light of various applications of attosecond electron beams such as in ultrafast electron diffraction and crystallography, or in time-resolved electron microscopy of physical, chemical, and biological processes. We also show that, for intense laser pulses, high-energy ionization takes place in narrow regions surrounding the momentum spiral, the exact form of which is determined by the shape of a driving pulse. The self-intersections of the spiral define the momenta for which the interference patterns in the energy distributions of photoelectrons are observed. Furthermore, these interference regions lead to the synthesis of single-electron wave packets characterized by coherent double-hump structures.