title: Chirped attosecond photoelectron spectroscopy.
abstract: We study analytically the photoionization of a coherent superposition of electronic states and show that chirped pulses can measure attosecond time scale electron dynamics just as effectively as transform-limited attosecond pulses of the same bandwidth. The chirped pulse with a frequency-dependent phase creates the interfering photoelectron amplitudes that measure the electron dynamics. We show that at a given pump-probe time delay the differential asymmetry oscillates as a function of photoelectron energy. Our results suggest that the important parameter for attosecond science is not the pulse duration, but the bandwidth of phased radiation.
authors.affiliation: Laboratoire de Chimie Théorique, Université de Sherbrooke, Sherbrooke, Québec J1K 2R1, Canada.
authors.forename: G L
authors.initials: GL
authors.lastname: Yudin
authors.forename: A D
authors.initials: AD
authors.lastname: Bandrauk
authors.forename: P B
authors.initials: PB
authors.lastname: Corkum