Computer simulation techniques for extreme nonlinear optics are reviewed with emphasis
on the high light-intensity regimes in which both bound and freed electronic states contribute …

Interaction of intense laser fields with atoms distorts the bound-state electron cloud. Tracing
the temporal response of the electron cloud to the laser field is of fundamental importance …

We discuss the connection between strong-field ionization, saturation of the Kerr response
and the formation of the Kramers–Henneberger (KH) atom and long-living excitations in …

The nonlinear optical response to high fields is absolutely measured for the noble gas atoms
He, Ne, Ar, Kr, and Xe. We find that the response is quadratic in the laser field magnitude up …

Motivated by the ongoing controversy over the origin of the nonlinear index saturation and
subsequent intensity clamping in femtosecond filaments, we study the atomic nonlinear …

We experimentally demonstrate that the transmission of a 1030 nm, 1.3 ps laser beam of
100 mJ energy through fog increases when its repetition rate increases to the kHz range …

The exact quantum time-dependent optical response of hydrogen under strong-field near-
infrared excitation is investigated and compared to the perturbative model widely used for …

In this paper we propose and demonstrate that the ultrafast nonlinear optical response of
atoms may be accurately calculated in terms of metastable states obtained as solutions of …

We propose to use the generation of even Brunel harmonics (BHs) by optical laser pulses
for high-resolution gas-biased coherent detection of lower-frequency radiation in terahertz …

The spontaneous emission of an atomic system in the field of a high-intensity femtosecond
laser pulse is considered within the framework of a consistent quantum-mechanical …