This paper has been prepared by the Symphony collaboration (University of Warsaw,
Uniwersytet Jagielloński, DESY/CNR and ICFO) on the occasion of the 25th anniversary of …

Experimental advances with laser intensities above 1 TW/cm 2, with pulse durations
between roughly 50 and 5 fs, have led to the discovery of new atomic effects that include …

Intense laser-matter interactions are at the center of interest in research and technology
since the development of high-power lasers. They have been widely used for fundamental …

With a classical ensemble model that includes electron correlations during the whole
ionization process, we investigate strong-field sequential double ionization of Ar by …

In the context of strong field–matter interaction, an increasing number of phenomena has
been found to be not understood within the single-active-electron approximation. For such …

Publisher Summary This chapter provides an overview on various scattering and reaction
processes taking place in a powerful laser field. These processes can be either laser …

70 years ago Maria Göppert-Mayer [1] showed that the energy of many photons can be
combined to achieve ionization in cases where the energy of one photon is not sufficient to …

The ion momentum spectra for nonsequential double ionization of rare gases (He, Ne and
Ar) in 23 fs 795 nm laser pulses were measured in the intensity range 0.075–1.25 PW cm …

The strong-field induced decay of a doubly excited, transient Coulomb complex Ar**→ Ar
2++ 2 e-is explored by tracing correlated two-electron emission in nonsequential double …

Multiple ionization of atoms by an ultrashort intense laser pulse is a process in which the few-
body problem is closely interrelated with the highly nonlinear interaction between the …