title: Time resolved Fano resonances.
abstract: Recent advances in the generation of sub-fs extreme ultraviolet pulses and attosecond metrology have opened up the possibility to trace the time evolution of electronic wave packets inside atoms in pump-probe experiments. We investigate the feasibility of observing the buildup of a Fano resonance in the time domain by attosecond streaking techniques. A time-resolved resonance is initialized by a sub-fs extreme ultraviolet-pump pulse in the presence of a synchronized phase-controlled probe laser pulse. The time evolution of the coherent superposition of resonant state and continuum is mapped onto a modulation of the electron spectrum as a function of the time delay between pump and probe pulse. (super-)Coster-Kronig transitions with lifetimes of approximately 400 asec( are identified as prime candidates.
authors.affiliation: Institute for Theoretical Physics, Vienna University of Technology, A-1040 Vienna, Austria.
authors.forename: Marlene
authors.initials: M
authors.lastname: Wickenhauser
authors.forename: Joachim
authors.initials: J
authors.lastname: Burgdörfer
authors.forename: Ferenc
authors.initials: F
authors.lastname: Krausz
authors.forename: Markus
authors.initials: M
authors.lastname: Drescher