Attosecond pulses are generated by a macroscopic number of ionizing atoms interacting
with a focused laser pulse, via the process of high harmonic generation. The physics of their …

High-harmonic generation provides an attractive light source of coherent radiation in the
extreme-ultraviolet (XUV) and soft-x-ray regions of the spectrum and allows for the …

With the discovery of above-threshold ionization (ATI) by Agostini et al.(1979) intense-laser
atom physics entered the nonperturbative regime. These experiments recorded the …

Atoms interacting with intense laser fields can emit electrons and photons of very high
energies. An intuitive and quantitative explanation of these highly nonlinear processes can …

Temporal probing of a number of fundamental dynamical processes requires intense pulses
at femtosecond or even attosecond (1 as= 10-18 s) timescales. A frequency 'comb'of …

We present the advances in x-ray femtosecond pulse generation and the most recent
discoveries in the field of ultrashort (femtosecond) x-ray science. Nowadays x-rays show …

Sources of short wavelength radiation with femtosecond to attosecond pulse durations, such
as synchrotrons or free electron lasers, have already made possible numerous, and will …

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 …

Molecules constituted by different isotopes are different in vibrational modes, making it
possible to elucidate the mechanism of a chemical reaction via the kinetic isotope effect …

We have investigated the intensity dependence of high-order harmonic generation in argon
when the two shortest quantum paths contribute to the harmonic emission. For the first time …