title: Spectral features and modeling of high-order harmonics generated by sub-10-fs pulses
abstract: Harmonic radiation generated in a neon gas jet by sub-10-fs laser pulses was investigated both experimentally and theoretically. The spectral profile of the harmonics with respect to the order, their intensity and relative spectral shifts were measured as a function of the position of the gas jet. The results point out spectral features typical of the quasi-single-cycle excitation regime. A nonadiabatic three-dimensional numerical model was developed, which provides harmonic spectra in remarkable agreement with the experiments.
authors.affiliation: Istituto Nazionale Fisica della Materia, Laboratorio di Elettronica Quantistica-D.E.I., Universita di Padova, Padova, Italy.
authors.initials: P
authors.lastname: Villoresi
authors.initials: P
authors.lastname: Ceccherini
authors.initials: L
authors.lastname: Poletto
authors.initials: G
authors.lastname: Tondello
authors.initials: C
authors.lastname: Altucci
authors.initials: R
authors.lastname: Bruzzese
authors.lastname: de Lisio C
authors.initials: M
authors.lastname: Nisoli
authors.initials: S
authors.lastname: Stagira
authors.initials: G
authors.lastname: Cerullo
authors.lastname: De Silvestri S
authors.initials: O
authors.lastname: Svelto