The emerging application of attosecond techniques to molecular systems allows the role of
electronic coherence in the control of chemical reactions to be investigated. Prompt …

Photoelectron holography constitutes a powerful tool for the ultrafast imaging of matter, as it
combines high electron currents with subfemtosecond resolution, and gives information …

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 …

Interaction of intense laser fields with atoms distorts the bound-state electron cloud. Tracing
the temporal response of the electron cloud to the laser field is of fundamental importance …

Strong-field ionization provides fundamental insight into light-matter interactions, encoding
the structure of atoms and molecules on the subångström and subfemtosecond scales. In …

Laser-driven electron recollision is at the heart of the rapidly growing field of attosecond
science. The recollision wavepacket is qualitatively described within the strong-field …

Atoms undergoing strong-field ionization in two-color circularly polarized femtosecond laser
fields exhibit unique two-dimensional photoelectron trajectories and can emit bright …

We demonstrate theoretically that the temporal structure of high harmonic x-ray pulses
generated with midinfrared lasers differs substantially from those generated with near …

Ultrafast strong-field physics provides insight into quantum phenomena that evolve on an
attosecond time scale, the most fundamental of which is quantum tunneling. The tunneling …

Watching the valence electron move in molecules on its intrinsic timescale has been one of
the central goals of attosecond science and it requires measurements with subatomic spatial …