Key properties of quantum materials stem from dynamic interaction chains that connect
stable electronic quasiparticles through short-lived coherences, which are difficult to control …

Since the first demonstration of the generation of attosecond pulses (1 as= 10− 18 s) in the
extreme-ultraviolet spectral region, several measurement techniques have been introduced …

The present status and development of strong-field nano-optics, an emerging field of
nonlinear optics, is discussed. A nonperturbative regime of light-matter interactions is …

Delocalized Bloch electrons and the low-energy correlations between them determine key
optical, electronic and entanglement functionalities of solids, all the way through to phase …

Field emission of electrons underlies great advances in science and technology, ranging
from signal processing at ever higher frequencies to imaging of the atomic-scale structure of …

The measurement and control of light field oscillations enable the study of ultrafast
phenomena on sub-cycle time scales. Electro-optic sampling (EOS) is a powerful field …

Electronic dynamics in liquids are of fundamental importance, but time-resolved experiments
have so far remained limited to the femtosecond time scale. We report the extension of …

Photoemission spectroscopy is central to understanding the inner workings of condensed
matter, from simple metals and semiconductors to complex materials such as Mott insulators …

Attosecond science is based on electron dynamics driven by a strong optical electric field
and has evolved beyond its original scope in gas-phase atomic and molecular physics to …

Attosecond chronoscopy has revealed small but measurable delays in photoionization,
characterized by the ejection of an electron on absorption of a single photon. Ionization …