Physics Colloquium: Paul Corkum, University of Ottawa
Wed, Feb 20
4:00 PM — 5:00 PM
Marshak160 Convent Avenue
"Atto-Science: what we learn by converting many photons into one."Pesented by Paul Corkum, Joint Attosecond Science Lab, University of Ottawa and National Research Council of Canada.
A (sheared) interferometer can measure most properties of light so we should be able to measure most properties of the electron . I will show how high harmonic or attosecond spectroscopy can image molecular orbitals  or follow chemical dynamics of small molecules [5,6].
Attosecond pulse generation can be understood via quantum trajectories of an ionizing electron. A trajectory begins from a bound state and returns to the same state after an excursion in the continuum. Quantum trajectories, such as these, map onto an interferometer – an electron interferometer created by light. This mapping makes it obvious that weak fields perturb attosecond pulse generation and thereby construct perturbative nonlinear optics on top of the non-perturbative process . I will show how this allows us develop an all optical method to measure the space-time structure of attosecond pulses . doi:10.1038/nphys2525 (2013).