Quantum-path resolved attosecond high-harmonic spectroscopy - Direction des applications militaires Access content directly
Journal Articles Physical Review Letters Year : 2023

Quantum-path resolved attosecond high-harmonic spectroscopy


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.


Fichier principal
Vignette du fichier
Short_and_Long_HHS_20230222.pdf (5.99 Mo) Télécharger le fichier
Origin : Publisher files allowed on an open archive

Dates and versions

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





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⟩
47 View
61 Download



Gmail Facebook X LinkedIn More