When an atom or molecule is exposed to a short intense laser pulse, electrons that were
removed at an earlier time may be driven back by the oscillating electric field of the laser to …

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

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 …

High-harmonic generation driven by two-color counter-rotating circularly polarized laser
fields was recently demonstrated experimentally as a breakthrough source of bright …

Interaction of a strong laser pulse with matter transfers not only energy but also linear
momentum of the photons. Recent experimental advances have made it possible to detect …

Extraction of the photoelectron spectrum (PES) from the time-dependent wave-packet
calculations is a fundamental requirement for studying strong-field ionization. To analyze the …

The formation of near-threshold structures in the angle-resolved photoelectron spectrum, the
cusp in the transverse electron momentum distribution, and the forward-backward …

We present a time-dependent density-functional method able to describe the photoelectron
spectrum of atoms and molecules when excited by laser pulses. This computationally …

We studied the elementary processes of excitation and ionization of atomic hydrogen in an
intense 800-nm pulse with intensity in the 1.0 to 2.5× 10 14 W/cm 2 range. By analyzing …

Atomic ionization by intense mid-infrared (mid-IR) pulses produces low-electron-energy
features that the strong-field approximation, which is expected to be valid in the tunneling …