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.
Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg, Germany.
R
R
Gopal
K
K
Simeonidis
R
R
Moshammer
Th
T
Ergler
M
M
Dürr
M
M
Kurka
K-U
KU
Kühnel
S
S
Tschuch
C-D
CD
Schröter
D
D
Bauer
J
J
Ullrich
A
A
Rudenko
O
O
Herrwerth
Th
T
Uphues
M
M
Schultze
E
E
Goulielmakis
M
M
Uiberacker
M
M
Lezius
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MF
Kling