Three-dimensional momentum imaging of electron wave packet interference in few-cycle laser pulses.
Using a reaction microscope, three-dimensional (3D) electron (and ion) momentum (P) spectra have been recorded for carrier-envelope-phase (CEP) stabilized few-cycle ( approximately 5 fs), intense ( approximately 4 x 10(14) W/cm2) laser pulses (740 nm) impinging on He. Preferential emission of low-energy electrons (E(e)<15 eV) to either hemisphere is observed as a function of the CEP. Clear interference patterns emerge in P space at CEPs with maximum asymmetry, interpreted as attosecond interferences of rescattered and directly emitted electron wave packets by means of a simple model.
Gopal
R
R
Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg, Germany.
Simeonidis
K
K
Moshammer
R
R
Ergler
Th
T
Dürr
M
M
Kurka
M
M
Kühnel
K-U
KU
Tschuch
S
S
Schröter
C-D
CD
Bauer
D
D
Ullrich
J
J
Rudenko
A
A
Herrwerth
O
O
Uphues
Th
T
Schultze
M
M
Goulielmakis
E
E
Uiberacker
M
M
Lezius
M
M
Kling
M F
MF