2017/07/11 by François Risoud, Risoud, F., Camille Lévêque +13
Chemistry · Physics and Astronomy · #FOS: Physical sciences #Laser-Matter Interactions and Applications #Optics (physics.optics) #Photochemistry and Electron Transfer Studies #Spectroscopy and Quantum Chemical Studies
paper · pdf · doi:10.48550/arxiv.1707.03364
openalex publication_date 2017/07/11 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We study theoretically the two-center interferences occurring in high harmonic generation from diatomic molecules. By solving the time-dependent Schroedinger equation, either numerically or with the molecular strong-field approximation, we show that the electron dynamics results in a strong spectral smoothing of the interference, depending on the value and sign of the driving laser field at recombination. Strikingly, the associated phase-jumps are in opposite directions for the short and long trajectories. In these conditions, the harmonic emission is not simply proportional to the recombination dipole any more. This has important consequences in high harmonic spectroscopy, e.g., for accessing the molecular-frame recombination dipole in amplitude and phase.