title: High harmonic interferometry of multi-electron dynamics in molecules.
abstract: High harmonic emission occurs when an electron, liberated from a molecule by an incident intense laser field, gains energy from the field and recombines with the parent molecular ion. The emission provides a snapshot of the structure and dynamics of the recombining system, encoded in the amplitudes, phases and polarization of the harmonic light. Here we show with CO(2) molecules that high harmonic interferometry can retrieve this structural and dynamic information: by measuring the phases and amplitudes of the harmonic emission, we reveal 'fingerprints' of multiple molecular orbitals participating in the process and decode the underlying attosecond multi-electron dynamics, including the dynamics of electron rearrangement upon ionization. These findings establish high harmonic interferometry as an effective approach to resolving multi-electron dynamics with sub-Angström spatial resolution arising from the de Broglie wavelength of the recombining electron, and attosecond temporal resolution arising from the timescale of the recombination event.
authors.affiliation: [1] National Research Council of Canada, 100 Sussex Drive, Ottawa, Ontario K1A 0R6, Canada [2] Max-Born Institute, 2a Max-Born-Strasse, Berlin D-12489, Germany.
authors.forename: Olga
authors.initials: O
authors.lastname: Smirnova
authors.forename: Yann
authors.initials: Y
authors.lastname: Mairesse
authors.forename: Serguei
authors.initials: S
authors.lastname: Patchkovskii
authors.forename: Nirit
authors.initials: N
authors.lastname: Dudovich
authors.forename: David
authors.initials: D
authors.lastname: Villeneuve
authors.forename: Paul
authors.initials: P
authors.lastname: Corkum
authors.forename: Misha Yu
authors.initials: MY
authors.lastname: Ivanov