The field of laser-matter interaction traditionally deals with the response of atoms, molecules,
and plasmas to an external light wave. However, the recent sustained technological …

The frequency doubling of laser light was one of the first new phenomena observed
following the invention of the laser over 50 years ago. Since then, the quest to extend …

Attosecond metrology has so far largely remained limited to titanium: sapphire lasers
combined with an active stabilization of the carrier-envelope phase (CEP). These sources …

Time-resolved x-ray absorption spectroscopy (TR-XAS) has so far practically been limited to
large-scale facilities, to subpicosecond temporal resolution, and to the condensed phase …

High-harmonic generation (HHG) traditionally combines~ 100 near-infrared laser photons to
generate bright, phase-matched, extreme ultraviolet beams when the emission from many …

We study photoionization of argon atoms excited by attosecond pulses using an
interferometric measurement technique. We measure the difference in time delays between …

Attosecond light pulses in the extreme ultraviolet have drawn a great deal of attention due to
their ability to interrogate electronic dynamics in real time. Nevertheless, to follow charge …

The availability of X‐ray light sources with increased resolution and intensity has provided a
foundation for increasingly sophisticated experimental studies exploiting the spectroscopy of …

We demonstrate, to our knowledge, the first bright circularly polarized high-harmonic beams
in the soft X-ray region of the electromagnetic spectrum, and use them to implement X-ray …

Laser-driven high-harmonic generation provides the only demonstrated route to generating
stable, tabletop attosecond x-ray pulses but has low flux compared to other x-ray …