Journal ArticleDOI
Recoil-Ion momentum distributions for single and double ionization of helium in strong laser fields
Th. Weber,M. Weckenbrock,André Staudte,Lutz Spielberger,Ottmar Jagutzki,V. Mergel,F. Afaneh,G. Urbasch,M. Vollmer,Harald Giessen,Reinhard Dörner +10 more
TLDR
The momentum distributions of singly and doubly charged helium ions created in the focus of 220 fs, 800 nm laser pulses at intensities of (2.9-6.6)x10(14) W/cm(2) are measured.Abstract:
We have measured the momentum distributions of singly and doubly charged helium ions created in the focus of 220 fs, 800 nm laser pulses at intensities of $(2.9--6.6)\ifmmode\times\else\texttimes\fi{}{10}^{14}\mathrm{W}/{\mathrm{cm}}^{2}$. All ions are emitted strongly aligned along the direction of polarization of the light. We find the typical momenta of the ${\mathrm{He}}^{2+}$ ions to be 5--10 times larger than those of the ${\mathrm{He}}^{1+}$ ions and a two peak structure at the highest intensity.read more
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Proceedings Article
Attosecond Physics
TL;DR: In this paper, an attosecond "oscilloscope" was used to visualize the oscillating electric field of visible light with an oscillator and probe multi-electron dynamics in atoms, molecules and solids.
Journal ArticleDOI
Recoil-ion and electron momentum spectroscopy: reaction-microscopes
Joachim Ullrich,R. Moshammer,Alexander Dorn,Reinhard Dörner,L. Ph. H. Schmidt,Horst Schmidt-Böcking +5 more
TL;DR: In this article, the authors present a comprehensive set of FDCSs for single ionization of atoms by ion-impact, the most basic atomic fragmentation reaction, brought new insight, a couple of surprises and unexpected challenges to theory at keV to GeV collision energies.
Book ChapterDOI
Above-threshold ionization: From classical features to quantum effects
Journal ArticleDOI
Correlated electron emission in multiphoton double ionization
Th. Weber,Harald Giessen,M. Weckenbrock,G. Urbasch,André Staudte,Lutz Spielberger,Ottmar Jagutzki,V. Mergel,M. Vollmer,Reinhard Dörner +9 more
TL;DR: A strong correlation is reported between the magnitude and the direction of the momentum of two electrons that are emitted from an argon atom, driven by a femtosecond laser pulse (at 38 TW cm-2).
Journal ArticleDOI
Theories of photoelectron correlation in laser-driven multiple atomic ionization
TL;DR: Theoretical avenues of attack have emerged in two categories, which are strikingly different as mentioned in this paper, which can be labeled as "all-at-once" and "step-by-step" approaches.