Attosecond electron wavepackets are produced when an intense laser field ionizes an atom
or a molecule 1 . When the laser field drives the wavepackets back to the parent ion, they …

We study high-order harmonic generation in the general case of absorbing and dispersive
atomic gas media. For ultrashort laser pulses, the harmonic conversion efficiency tends to a …

Conical intersections play a crucial role in the chemistry of most polyatomic molecules, ranging
from the simplest bimolecular reactions to the photostability of DNA. The real-time study …

We perform high harmonic generation spectroscopy of aligned nitrogen molecules to characterize
the attosecond dynamics of multielectron rearrangement during strong-field ionization. …

Circular dichroism in the extreme ultraviolet range is broadly used as a sensitive structural
probe of matter, from the molecular photoionization of chiral species 1 , 2 , 3 to the magnetic …

We photoionize nitrogen molecules with a train of extreme ultraviolet attosecond pulses together
with a weak infrared field. We measure the phase of the two-color two-photon ionization …

We generate high-order harmonics by using an 800-nm fundamental pulse whose polarization
evolves with time. Controlling the ellipticity modulation of the fundamental field allows us …

We study the Cooper minimum in high-order-harmonic generation from argon atoms by using
long wavelength laser pulses. We find that the minimum in high-order-harmonic spectra is …

We report the first experimental demonstration (to our knowledge) of high-order harmonic
generation in rare gases driven by a state-of-the-art high-power Yb-doped-fiber chirped-pulse …

We introduce a new extracavity pulse-compression technique suitable for generating high-energy
femtosecond pulses. This technique is based on spectral broadening by self-phase …