California Institute of Technology Pasadena United States
Publications of this research are reported in Science, JACS, JPC, ChemPhysChem, PNAS, Nano Lett., and PCCP. Developmentally, we have advanced ultrafast electron microscopy and diffraction to a new level. The electron pulses typically have an energy of 30 keV for diffraction and 100-200 keV for microscopy, corresponding to speeds of 33-70 of the speed of light. Recently, we introduced the concept of tilted optical pulses into diffraction and imaging techniques and demonstrated the methodology experimentally. In a separate contribution, we provided a novel approach for reaching the attosecond time domain. Such attosecond electron pulses are significantly shorter than those achievable with extreme UV light sources near 25 nm -50 eV and have the potential for applications in the visualization of ultrafast electron dynamics.