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 …

This review presents the technological infrastructure that will be available at the Extreme
Light Infrastructure Attosecond Light Pulse Source (ELI-ALPS) international facility. ELI …

This tutorial presents an introduction to the interaction of light and matter on the attosecond
timescale. Our aim is to detail the theoretical description of ultra-short time delays and to …

Attosecond extreme-ultraviolet pulses have a complex space–time structure. However, at
present, there is no method to observe this intricate detail; all measurements of the duration …

We experimentally demonstrate that atomic orbital parity mix interferences can be temporally
controlled on an attosecond time scale. Electron wave packets are formed by ionizing argon …

We study the generation of below-threshold harmonics in a model atom by extending the
three-step semiclassical model of harmonic generation to include effects of the atomic …

We investigate the generation of even and odd harmonics using an intense laser and a
weak second harmonic field. Our theoretical approach is based on solving the saddle-point …

We study high-order harmonic generation in argon driven by an intense 800 nm laser field
and a small fraction of its second harmonic. The intensity and divergence of the emitted even …

We investigate photoelectron holography in bichromatic linearly polarized fields of
commensurate frequencies rω and sω, with emphasis on the existing symmetries and for …

We report on high-order harmonic generation (HHG) using a Ti: sapphire laser beam phase
shaped with a binary diffractive optical element (DOE) to create two spatially separated …