Dr. David Villeneuve
National Research Council
Attosecond Imaging of Molecular Structure and Molecular Orbitals
Tuesday, November 15, 2007
Photoelectron spectroscopy has long been used to learn about the electronic structure of molecules. Surprisingly, an intense femtosecond laser can yield a time-reversed version of PES. The laser field tunnel-ionizes a molecule; the electron can recombine with the parent ion and give off an xuv photon. The photon contains information about the molecule. An image of a single electron orbital wave function can be obtained within the Hartree Fock approximation. Pump-probe experiments with femtosecond and even attosecond time resolution can be performed to observe chemical reactions and electronic motion. A range of experiments will be described that seek to understand the potential of this new technique.