Interferences of ultrashort free electron wave packets.
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.
Wollenhaupt
M
M
Universität Kassel, Fachbereich Physik, Heinrich-Plett-Strasse 40, D-34132 Kassel, Germany.
Assion
A
A
Liese
D
D
Sarpe-Tudoran
Ch
Ch
Baumert
T
T
Zamith
S
S
Bouchene
M A
MA
Girard
B
B
Flettner
A
A
Weichmann
U
U
Gerber
G
G