An overview of both experimental and theoretical results in the field of resonant scattering of
tunable soft and hard x-ray radiation is presented, with a main focus on the closely related …

Abstract Short wavelength Free-Electron Lasers (FELs) are among the newest light sources
available to scientists to probe a wide range of phenomena, with chemical, physical and …

The detailed structure of superradiant pulses generated from a free-electron laser (FEL)
oscillator was experimentally revealed for the first time. Owing to the phase retrieval with a …

Intense x-ray and extreme ultraviolet (XUV) light sources have been available for decades,
however, due to weak nonlinear interaction in the XUV photon energy range, observation of …

We report on the experimental observation of a strong-field dressing of an autoionizing two-
electron state in helium with intense extreme-ultraviolet laser pulses from a free-electron …

Cavity‐enhanced superfluorescence (CESF) in quantum dot (QD) system is an ultrafast and
intense lasing generated by combination of quantum coupling effect and optically stimulated …

We present a comprehensive experimental and theoretical study on superfluorescence in
the extreme ultraviolet wavelength regime. Focusing a free-electron laser pulse in a cell …

Extreme-ultraviolet (XUV) sources including high-harmonic generation (HHG), free-electron
lasers (FELs), soft-X-ray lasers and laser-driven plasmas are widely used for applications …

Intense sub-micrometre focusing of a soft X-ray free-electron laser (FEL) was achieved by
using an ellipsoidal mirror with a high numerical aperture. A hybrid focusing system in …

We investigated the superfluorescent decay process of dense rubidium atomic vapor in a
cell. Using a femtosecond laser pulse, the atoms were excited from the 5 S ground state to …