title: Interferences of ultrashort free electron wave packets.
abstract: Interferences of free electron wave packets generated by a pair of identical, time-delayed, femtosecond laser pulses which ionize excited atomic potassium have been observed. Two different schemes are investigated: threshold electrons produced by one-photon ionization with parallel laser polarization and above threshold ionization electrons produced by a two-photon transition with crossed laser polarization. Our results show that the temporal coherence of light pulses is transferred to free electron wave packets, thus opening the door to a whole variety of exciting experiments.
authors.affiliation: Universität Kassel, Fachbereich Physik, Heinrich-Plett-Strasse 40, D-34132 Kassel, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Wollenhaupt
authors.forename: A
authors.initials: A
authors.lastname: Assion
authors.forename: D
authors.initials: D
authors.lastname: Liese
authors.forename: Ch
authors.initials: Ch
authors.lastname: Sarpe-Tudoran
authors.forename: T
authors.initials: T
authors.lastname: Baumert
authors.forename: S
authors.initials: S
authors.lastname: Zamith
authors.forename: M A
authors.initials: MA
authors.lastname: Bouchene
authors.forename: B
authors.initials: B
authors.lastname: Girard
authors.forename: A
authors.initials: A
authors.lastname: Flettner
authors.forename: U
authors.initials: U
authors.lastname: Weichmann
authors.forename: G
authors.initials: G
authors.lastname: Gerber