Quantum-path resolved attosecond high-harmonic spectroscopy - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Physical Review Letters Année : 2023

Quantum-path resolved attosecond high-harmonic spectroscopy

Résumé

Strong-field ionization of molecules releases electrons which can be accelerated and driven back to recombine with their parent ion, emitting high-order harmonics. This ionization also initiates attosecond electronic and vibrational dynamics in the ion, evolving during the electron travel in the continuum. Revealing this subcycle dynamics from the emitted radiation usually requires advanced theoretical modeling. We show that this can be avoided by resolving the emission from two families of electronic quantum paths in the generation process. The corresponding electrons have the same kinetic energy, and thus the same structural sensitivity, but differ by the travel time between ionization and recombination—the pump-probe delay in this attosecond self-probing scheme. We measure the harmonic amplitude and phase in aligned CO$_2$ and N$_2$ molecules and observe a strong influence of laser-induced dynamics on two characteristic spectroscopic features: a shape resonance and multichannel interference. This quantum-path resolved spectroscopy thus opens wide prospects for the investigation of ultrafast ionic dynamics, such as charge migration.

Mots clés

Fichier principal
Vignette du fichier
Short_and_Long_HHS_20230222.pdf (5.99 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-04000611 , version 1 (22-02-2023)

Licence

Paternité

Identifiants

Citer

Antoine Camper, Amélie Ferré, Valérie Blanchet, Dominique Descamps, Nan Lin, et al.. Quantum-path resolved attosecond high-harmonic spectroscopy. Physical Review Letters, 2023, 130 (8), pp.083201. ⟨10.1103/PhysRevLett.130.083201⟩. ⟨hal-04000611⟩
63 Consultations
91 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More