Recent progress in high power ultrafast short-wave and mid-wave infrared lasers has
enabled gas-phase high harmonic generation (HHG) in the water window and beyond, as …

Frequency conversion processes, such as second-and third-harmonic generation, are
commonly realized in nonlinear optics, offering opportunities for applications in photonics …

The generation of extremely short isolated attosecond pulses requires both a broad spectral
bandwidth and control of the spectral phase. Rapid progress has been made in both …

Nonlinear optics is concerned with the propagation of intense beams of light through a
material system. The optical properties of the medium can be modified by the intense light …

Free-electron lasers and high-harmonic-generation table-top systems are new sources of
extreme-ultraviolet to hard X-ray photons, providing ultrashort pulses that are intense …

The rise time of intense radiation determines the maximum field strength atoms can be
exposed to before their polarizability dramatically drops due to the detachment of an outer …

Periodic nanostructures are observed inside silica glass after irradiation by a focused beam
of a femtosecond Ti: sapphire laser. Backscattering electron images of the irradiated spot …

The frequency doubling of laser light was one of the first new phenomena observed
following the invention of the laser over 50 years ago. Since then, the quest to extend …

High-harmonic generation by focusing a femtosecond laser onto a gas is a well-known
method of producing coherent extreme-ultraviolet (EUV) light,,. This nonlinear conversion …

Abstract The word'attosecond'(1 as= 10− 18 s) officially entered the vocabulary of physics
when sub-femtosecond pulses of UV/XUV light produced either by nonlinear frequency …