X-ray free-electron lasers provide unique opportunities for exploring ultrafast dynamics and
for imaging the structures of complex systems. Understanding the response of individual …

The quantum interference of two molecular wave packets has been precisely controlled in
the B electronic state of the I 2 molecule by using a pair of fs laser pulses whose relative …

Circular dichroism (CD) describes the different responses of a chiral object to circularly
polarized light of opposite handedness and serves as the basis of most chirality-sensitive …

Attosecond pulses are central to the investigation of valence- and core-electron dynamics
on their natural timescales 1 , 2 – 3 . The reproducible generation and characterization of …

Theory predicts that double-core-hole (DCH) spectroscopy can provide a new powerful means
of differentiating between similar chemical systems with a sensitivity not hitherto possible. …

X-ray free-electron lasers (XFELs) and table-top sources of x-rays based upon high harmonic
generation (HHG) have revolutionized the field of ultrafast x-ray atomic and molecular …

Attosecond chronoscopy is central to the understanding of ultrafast electron dynamics in
matter from gas to the condensed phase with attosecond temporal resolution. It has, however, …

We describe an experimental method to probe the adsorption of water at the surface of
isolated, substrate-free TiO 2 nanoparticles (NPs) based on soft X-ray spectroscopy in the gas …

In condensed matter systems, strong optical excitations can induce phonon-driven processes
that alter their mechanical properties. We report on a new phenomenon where a massive …

We explore the potential of double core hole electron spectroscopy for chemical analysis in
terms of x-ray two-photon photoelectron spectroscopy. The creation of deep single and …