Résumé
The interaction of atoms with intense laser radiation leads to the generation of high-order harmonics of the laser field. In the time domain, this corresponds to a train of pulses in the extreme ultraviolet range and with attosecond duration. The short pulse duration and broad bandwidth of attosecond pulses allow us to measure the phase and amplitude of electronic wave packets created by photoionization, using an interferometric technique. This gives us access to the temporal dynamics of the process that led to this wave-packet. The presentation has introduced the physics of high-order harmonic generation and attosecond pulses, and described applications concerning photoionization dynamics.
