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 …

When an atom or molecule is exposed to a short intense laser pulse, electrons that were
removed at an earlier time may be driven back by the oscillating electric field of the laser to …

Electron migration in molecules is the progenitor of chemical reactions and biological
functions after light-matter interaction. Following this ultrafast dynamics, however, has been …

Single-electron wavefunctions, or orbitals, are the mathematical constructs used to describe
the multi-electron wavefunction of molecules. Because the highest-lying orbitals are …

High harmonic emission occurs when an electron, liberated from a molecule by an incident
intense laser field, gains energy from the field and recombines with the parent molecular ion …

Modern laser sources nowadays deliver ultrashort light pulses reaching few cycles in
duration and peak powers exceeding several terawatt (TW). When such pulses propagate …

A strong laser field may tunnel ionize a molecule from several orbitals simultaneously,
forming an attosecond electron–hole wavepacket. Both temporal and spatial information on …

Molecular structure is usually determined by measuring the diffraction pattern the molecule
impresses on x-rays or electrons. We used a laser field to extract electrons from the …

We propose an empirical formula for the static field ionization rates of atoms and molecules
by extending the well-known analytical tunnelling ionization rates to the barrier-suppression …

High-order harmonic generation (HHG) from atoms and molecules offers potential
application as a coherent ultrashort radiation source in the extreme ultraviolet and soft X-ray …