Spectral features and modeling of high-order harmonics generated by sub-10-fs pulses
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.
Villoresi
P
Istituto Nazionale Fisica della Materia, Laboratorio di Elettronica Quantistica-D.E.I., Universita di Padova, Padova, Italy.
Ceccherini
P
Poletto
L
Tondello
G
Altucci
C
Bruzzese
R
de Lisio C
Nisoli
M
Stagira
S
Cerullo
G
De Silvestri S
Svelto
O