Mariano Trigo

TL;DR: This analysis shows that the relative arrival time of the Ti:Sapphire laser and the x-ray pulses had a distribution with a standard deviation of approximately 120 fs, which suggests that simple technical improvements could reduce the jitter to better than 50 fs.

TL;DR: It is shown that atomic disordering in photoexcited vanadium dioxide (VO2) is central to the transition mechanism and that, after photoexcitation, the system explores a large volume of phase space on a time scale comparable to that of a single phonon oscillation.

TL;DR: Using 1.1 keV photons for sequential x-ray ionization of impulsively aligned molecular nitrogen, the Linac Coherent Light Source free electron laser enables double core vacancy Auger electron spectroscopy, an entirely new way to study femtosecond chemical dynamics with Auger electrons that probe the local valence structure of molecules near a specific atomic core.

TL;DR: In this paper, the coherent dynamic of phonons in crystalline materials was observed using X-ray free-electron (XFED) laser pulses, which could provide insight into low energy collective excitations in solids and how they interact at a microscopic level to determine the material's macroscopic properties.

TL;DR: In this paper, femtosecond midinfrared pulses are used to directly excite the lattice of the single-layer manganite La 0.5Sr1.5MnO4.