Multidimensional high-harmonic echo spectroscopy: Resolving coherent electron dynamics in the EUV regime.

ABSTRACT: We theoretically propose a multidimensional high-harmonic echo spectroscopy technique which utilizes strong optical fields to resolve coherent electron dynamics spanning an energy range of multiple electronvolts. Using our recently developed semi-perturbative approach, we can describe the coherent valence electron dynamics driven by a sequence of phase-matched and well-separated short few-cycle strong infrared laser pulses. The recombination of tunnel-ionized electrons by each pulse coherently populates the valence states of a molecule, which allows for a direct observation of its dynamics via the high harmonic echo signal. The broad bandwidth of the effective dipole between valence states originated from the strong-field excitation results in nontrivial ultra-delayed partial rephasing ech

SUBMITTER: Jiang S 

PROVIDER: S-EPMC10873645 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature