This is a review of some recent development in femtosecond filamentation science with
emphasis on our collective work. Previously reviewed work in the field will not be discussed …

Abstract 2012 marked the 50th anniversary of the first published prediction of the self-
focusing phenomenon in light beams. The recent revived interest in the subject is due to …

Tomography—cross-sectional imaging based on measuring radiation transmitted through
an object along different directions—enables non-invasive imaging of hidden stationary …

While filaments are generally interpreted as a dynamic balance between Kerr focusing and
plasma defocusing, the role of the higher-order Kerr effect (HOKE) is actively debated as a …

Spatiotemporal pulse sha** provides control over the trajectory and range of an intensity
peak. While this control can enhance laser-based applications, the optical configurations …

We directly measure the nonlinear optical response in argon and nitrogen in a thin gas
target to laser intensities near the ionization threshold. No instantaneous negative nonlinear …

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 …

Spatiotemporal control over the intensity of a laser pulse has the potential to enable or
revolutionize a wide range of laser-based applications that currently suffer from the poor …

Femtosecond laser filament arrays are generated in air by using three kinds of step phase
plates with π phase lag, namely, the semicircular phase plate (SCPP), the quarter-circle …

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 …