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 …

Research on isolated attosecond pulses (IAPs) based on high-order harmonic generation
changed substantially around 2010. Before then, the Ti: sapphire laser was the de facto …

Advances in attosecond science have led to a wealth of important discoveries in atomic,
molecular, and solid-state physics and are progressively directing their footsteps toward …

Recent advances in the generation of well-characterized subfemtosecond laser pulses have
opened up unpredicted opportunities for the real-time observation of ultrafast electronic …

Laser excitation of nanometer-sized atomic and molecular clusters offers various
opportunities to explore and control ultrafast many-particle dynamics. Whereas weak laser …

This tutorial presents an introduction to power scaling concepts for high-order harmonic
generation (HHG) and attosecond pulse production. We present an overview of state-of-the …

We present the advances in x-ray femtosecond pulse generation and the most recent
discoveries in the field of ultrashort (femtosecond) x-ray science. Nowadays x-rays show …

The time-dependent complete-active-space self-consistent-field (TD-CASSCF) method for
the description of multielectron dynamics in intense laser fields is presented, and a …

Ultrafast-dynamics studies and femtosecond-pulse metrology both rely on the nonlinear
processes induced solely by an incident light pulse. Extending these approaches to the …

In the spectral range of the extreme ultraviolet at a wavelength of 13.3 nm, we have studied
the photoionization of xenon at ultrahigh intensities. For our ion mass-to-charge …