Intense ultrashort light pulses comprising merely a few wave cycles became routinely
available by the turn of the millennium. The technologies underlying their production and …

Time-dependent density-functional theory (TDDFT) describes the quantum dynamics of
interacting electronic many-body systems formally exactly and in a practical and efficient …

Strong-field physics is currently experiencing a shift towards the use of mid-IR driving
wavelengths. This is because they permit conducting experiments unambiguously in the …

Recoil-ion and electron momentum spectroscopy is a rapidly develo** technique that
allows one to measure the vector momenta of several ions and electrons resulting from …

Strong–laser–field physics is a research direction that relies on the use of high-power lasers
and has led to fascinating achievements ranging from relativistic particle acceleration to …

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 …

With the discovery of above-threshold ionization (ATI) by Agostini et al.(1979) intense-laser
atom physics entered the nonperturbative regime. These experiments recorded the …

Atoms interacting with intense laser fields can emit electrons and photons of very high
energies. An intuitive and quantitative explanation of these highly nonlinear processes can …

The theoretical description of the nonlinear photoionization of atoms and ions exposed to
high-intensity laser radiation is underlain by the Keldysh theory proposed in 1964. The …

Over the past thirty years, extensive studies of strong-field photoionization of atoms have
revealed both quantum and classical aspects including above-threshold ionization, electron …