Electron Scattering in Intense Laser Fields

A special issue of Atoms (ISSN 2218-2004).

Deadline for manuscript submissions: closed (31 January 2019) | Viewed by 12663

Special Issue Editor


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Guest Editor
Fakultaet fuer Physik, Universitaet Bielefeld, 33615 Bielefeld, Germany
Interests: AMO physics; intense-field interaction; graphene-laser interaction; quantum theory; quantum chaos

Special Issue Information

Dear Colleagues,

Electron scattering from ions, atoms and molecules in the presence of intense laser fields involve such processes as stimulated Bremsstrahlung and inverse-Bremsstrahlung, with emission and absorption of one or many photons, along with elastic, inelastic, as well as off-shell transitions in the target systems, which can be either assisted or induced (or both) by the laser field.  Besides their intrinsic interest, these processes are of importance in applicational research, such as, modelling the fully, or partially ionised laser-plasmas. Study of electron collisions in the presence of intense fields could be also of astrophysical interest, for example, in connection with radiative processes that can occur in the vicinity of galactic electromagnetic radiation sources. Another prospect of electron scattering in the presence of a laser field is the imaging of fast electronic motions in atomic and molecular systems. This possibility has arisen as a consequence of the development of ultrashort (including, atto second) laser pulses in the laboratory as well as the generation of coherent electron pulses by ionisation of atoms by the ultra-short laser pulses. This development could complement the traditional electron diffraction methods for determining the static structures by their extension to dynamical imaging by the pump-probe technique, in which the duration of the electron-pulse and the laser-pulse, and the delay between them, can all be varied independently, as well as, the laser-pulse could be employed prior to or subsequently with the electron-pulse. Such techniques could be used, for example, to determine the dynamic variation of the electronic structure in real time of a superposition state in the target system, that could be induced deliberately. This Special Issue of Atoms shall contain original research reports and a set of succinct and up-to-date review articles by the researchers working in the field. They could be either experimental or theoretical, or both, in content. The reviews are envisaged to be of interest not only to the active researchers of the subject but also to the young researches beginning to work in the field, and to more experienced scientists working in a neighbouring, or a different field, but are interested to gain an overview of the subject.

Prof. Dr. Farhad H.M. Faisal
Guest Editor

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Keywords

  • electrons
  • ions
  • atoms
  • molecules
  • scattering
  • laser assisted
  • laser induced
  • elastic
  • inelastic
  • off-shell
  • many photon
  • Bremsstrahlung
  • inverse-Bremsstrahlung
  • laser-plasma
  • astrophysical
  • ultra-short
  • laser-pulse
  • coherent
  • electron-pulse
  • pump-probe
  • delay
  • imaging

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Published Papers (3 papers)

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Research

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49 pages, 5947 KiB  
Article
Laser-Assisted (e, 2e) Collisions in the Symmetric/Asymmetric Coplanar Geometry
by Abdelkader Makhoute, Driss Khalil and Imane Ajana
Atoms 2019, 7(2), 40; https://doi.org/10.3390/atoms7020040 - 2 Apr 2019
Cited by 5 | Viewed by 3367
Abstract
In this review, we present a comprehensive survey of laser-assisted (e, 2e) reactions. The influence of a laser field on the dynamics of (e, 2e) collisions in atomic hydrogen is analyzed in the symmetric and asymmetric coplanar geometries. Particular attention is devoted to [...] Read more.
In this review, we present a comprehensive survey of laser-assisted (e, 2e) reactions. The influence of a laser field on the dynamics of (e, 2e) collisions in atomic hydrogen is analyzed in the symmetric and asymmetric coplanar geometries. Particular attention is devoted to the construction of the dressed (laser-modified) target wave functions, in both the initial and final states. The calculation is performed in the framework of Coulomb-Volkov-Born approximation, where the initial and final electrons are described by Volkov wave functions, while the interaction of the incident electron with the target atom is treated in the first and the second Born approximation. The state of the ejected electron is described by a Volkov/Coulomb-Volkov wave function. A detailed account is also given of the techniques we have used to evaluate the scattering amplitudes. The influence of the laser parameters (frequency, intensity, and direction of polarization) on the angular distribution of the ejected electron is discussed, and a number of illustrative examples are given. The structure of the triple differential cross section in the vicinity of resonances is also analyzed. Full article
(This article belongs to the Special Issue Electron Scattering in Intense Laser Fields)
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Review

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22 pages, 5779 KiB  
Review
Femtosecond Laser-Assisted Electron Scattering for Ultrafast Dynamics of Atoms and Molecules
by Reika Kanya and Kaoru Yamanouchi
Atoms 2019, 7(3), 85; https://doi.org/10.3390/atoms7030085 - 2 Sep 2019
Cited by 11 | Viewed by 3931
Abstract
The recent progress in experimental studies of laser-assisted electron scattering (LAES) induced by ultrashort intense laser fields is reviewed. After a brief survey of the theoretical backgrounds of the LAES process and earlier LAES experiments started in the 1970s, new concepts of optical [...] Read more.
The recent progress in experimental studies of laser-assisted electron scattering (LAES) induced by ultrashort intense laser fields is reviewed. After a brief survey of the theoretical backgrounds of the LAES process and earlier LAES experiments started in the 1970s, new concepts of optical gating and optical streaking for the LAES processes, which can be realized by LAES experiments using ultrashort intense laser pulses, are discussed. A new experimental setup designed for measurements of LAES induced by ultrashort intense laser fields is described. The experimental results of the energy spectra, angular distributions, and laser polarization dependence of the LAES signals are presented with the results of the numerical simulations. A light-dressing effect that appeared in the recorded LAES signals is also shown with the results of the numerical calculations. In addition, as applications of the LAES process, laser-assisted electron diffraction and THz-wave-assisted electron diffraction, both of which have been developed for the determination of instantaneous geometrical structure of molecules, are introduced. Full article
(This article belongs to the Special Issue Electron Scattering in Intense Laser Fields)
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36 pages, 742 KiB  
Review
Electron Scattering Processes in Non-Monochromatic and Relativistically Intense Laser Fields
by Felipe Cajiao Vélez, Jerzy Z. Kamiński and Katarzyna Krajewska
Atoms 2019, 7(1), 34; https://doi.org/10.3390/atoms7010034 - 6 Mar 2019
Cited by 17 | Viewed by 4460
Abstract
The theoretical analysis of four fundamental laser-assisted non-linear scattering processes are summarized in this review. Our attention is focused on Thomson, Compton, Møller and Mott scattering in the presence of intense electromagnetic radiation. Depending on the phenomena under considerations, we model the laser [...] Read more.
The theoretical analysis of four fundamental laser-assisted non-linear scattering processes are summarized in this review. Our attention is focused on Thomson, Compton, Møller and Mott scattering in the presence of intense electromagnetic radiation. Depending on the phenomena under considerations, we model the laser field as a single laser pulse of ultrashort duration (for Thomson and Compton scattering) or non-monochromatic trains of pulses (for Møller and Mott scattering). Full article
(This article belongs to the Special Issue Electron Scattering in Intense Laser Fields)
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