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.
Nonadiabatic three-dimensional model of high-order harmonic generation in the few-optical-cycle regime / E., Priori; G., Cerullo; M., Nisoli; S., Stagira; S., De Silvestri; P., Villoresi; L., Poletto; P., Ceccherini; Altucci, Carlo; Bruzzese, Riccardo; DE LISIO, Corrado. - In: PHYSICAL REVIEW A. - ISSN 1050-2947. - 61:6(2000), pp. 063801-1-063801-8. [10.1103/PhysRevA.61.063801]
Nonadiabatic 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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
