One of the great dream experiments in Science is to directly observe atomic motions as they
occur. Femtosecond electron diffraction provided the first'light'of sufficient intensity to …

The phase transition of VO 2 from a monoclinic insulator to a rutile metal, which occurs
thermally at TC= 340 K, can also be driven by strong photoexcitation. The ultrafast dynamics …

This review is devoted to the study of ultrafast laser ablation of solids and liquids. The
ablation of condensed matter under exposure to subpicosecond laser pulses has a number …

The electron-phonon coupling and the corresponding energy exchange are investigated
experimentally and by ab initio theory in nonequilibrium states of the free-electron metal …

The halide ions of organic-inorganic hybrid perovskites can strongly influence the interaction
between the central organic moiety and the inorganic metal halide octahedral units and thus …

The development of X-ray and electron diffraction methods with ultrahigh time resolution has
made it possible to map directly, at the atomic level, structural changes in solids induced by …

The electronic and structural properties of a material are strongly determined by its
symmetry. Changing the symmetry via a photoinduced phase transition offers new ways to …

Detection of the energy conversion pathways between photons, charge carriers, and the
lattice is of fundamental importance to understand fundamental physics and to advance …

We employ grazing-incidence femtosecond x-ray diffraction to characterize the coherent,
femtosecond laser-induced lattice motion of a bismuth crystal as a function of depth from the …

Squeezed states are quantum states of a harmonic oscillator in which the variance of two
conjugate variables each oscillate out of phase. Ultrafast optical excitation of crystals can …