title: Relative phase measurement of a stark wave packet in the vicinity of the saddle point
abstract: A gas of Rb atoms in a static electric field has been photoexcited to just above the classical ionization threshold by a phase-locked sequence of two far infrared pulses. A single laser pulse generates a series of ejected electron packets emerging at the saddle point of the potential; each of the ejected packets is characterized by a phase and a chirp. We calculate and measure these phases and chirps using the time dependent interference of the electronic wave function controlled by the delay between the two light pulses.
authors.affiliation: FOM-Institute for Atomic and Molecular Physics, Kruislaan 407, 1098 SJ Amsterdam, The Netherlands.
authors.initials: CW
authors.lastname: Rella
authors.initials: F
authors.lastname: Texier
authors.initials: LD
authors.lastname: Noordam
authors.initials: F
authors.lastname: Robicheaux