In recent work, we captured intrinsic sub-femtosecond electron-electron scattering dynamics in materials for the first time. A powerful new technique called atto-ARPES (i.e. attosecond angle-resolved photoemission) enables deep-sub-fs measurements with sufficient energy resolution to separate different bands and states. This is the first way to directly probe the contribution of electron...
It is demonstrated by numerical simulations that attosecond chirp in the 300 to 1000 eV range can be partially compensated by the negative dispersion of ionized or unionized molecular hydrogen gas to achieve 25-as duration.
Here we present an attosecond pump-probe beamline driven by a high power non-collinear optical parametric chirped pulse amplification (NOPCPA) system capable of running at a repetition rate of 100 kHz with a maximum output power of 24 W.
We report the generation of isolated soft X-ray attosecond pulses with pulse energies of tens of microjoules using an X-ray free-electron laser.
We present a robust generation of intense isolated attosecond pulses in the 100-eV spectral range for time-resolved nonlinear XUV spectroscopy. Through single-shot acquisitions and three-dimensional simulations we provide a complete description of the underlying processes.
Here we demonstrate control over the refraction of XUV radiation by using a gas jet with a density gradient across the XUV beam profile. In a first set of experiments, a gas-phase prism and a gas-phase lens are demonstrated.
