Since the discovery of electron-wave duality, electron scattering instrumentation has
developed into a powerful array of techniques for revealing the atomic structure of matter …

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 …

We present the development of the first ultrafast transmission electron microscope (UTEM)
driven by localized photoemission from a field emitter cathode. We describe the …

With the recent advances in ultrabright electron and x-ray sources, it is now possible to
extend crystallography to the femtosecond time domain to literally light up atomic motions …

Under strong optical excitation conditions, it is possible to create highly nonequilibrium
states of matter. The nuclear response is determined by the rate of energy transfer from the …

Interfacing electrons and light enables ultrafast electron microscopy and quantum control of
electrons, as well as new optical elements for high-sensitivity imaging. Here, we …

The modern electron microscope, as a result of recent revolutionary developments and
many evolutionary ones, now yields a wealth of quantitative knowledge pertaining to …

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 …

One of the grand challenges in chemistry has been to directly observe atomic motions
during chemical processes. The depiction of the nuclear configurations in space-time to …

We report on the complete characterization of time resolution in an ultrafast electron
diffraction (UED) instrument based on radio-frequency electron pulse compression. The …