A numerical model to calculate the high-order harmonics spectrum of a macroscopic gas target irradiated by a few-optical-cycle laser pulse is presented. The single-atom response, calculated within the nonadiabatic strong-field approximation, is the source term of a three-dimensional propagation code. The simulation results show remarkably good agreement with experiments performed in neon using laser pulses with durations of 30 and 7 fs. Both simulations and experiments show discrete and well-resolved harmonics even for the shortest driving pulses.
Non-adiabatic three-dimensional model of high-order harmonic generation in the few-optical cycle regime / Priori, E.; Cerullo, G.; Nisoli, M.; Stagira, S.; DE SILVESTRI, S.; Villoresi, P.; Poletto, P.; Ceccherini, F.; Altucci, Carlo; Bruzzese, Riccardo; DE LISIO, Corrado. - In: PHYSICAL REVIEW A. - ISSN 1050-2947. - 61:(2000), pp. 063801-1-063801-8.
Non-adiabatic three-dimensional model of high-order harmonic generation in the few-optical cycle regime
ALTUCCI, CARLO;BRUZZESE, RICCARDO;DE LISIO, CORRADO
2000
Abstract
A numerical model to calculate the high-order harmonics spectrum of a macroscopic gas target irradiated by a few-optical-cycle laser pulse is presented. The single-atom response, calculated within the nonadiabatic strong-field approximation, is the source term of a three-dimensional propagation code. The simulation results show remarkably good agreement with experiments performed in neon using laser pulses with durations of 30 and 7 fs. Both simulations and experiments show discrete and well-resolved harmonics even for the shortest driving pulses.| File | Dimensione | Formato | |
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