Optimization of attosecond pulse generation.
The generation of attosecond pulses by superposition of high harmonics relies on their synchronization in the emission. Our experiments in the low-order, plateau, and cutoff regions of the spectrum reveal different regimes in the electron dynamics determining the synchronization quality. The shortest pulses are obtained by combining a spectral filtering of harmonics from the end of the plateau and the cutoff, and a far-field spatial filtering that selects a single electron quantum path contribution to the emission. This method applies to isolated pulses as well as pulse trains.
Mairesse
Y
Y
CEA/DSM/DRECAM/SPAM, Centre d'Etudes de Saclay, Gif-sur-Yvette, France.
de Bohan
A
A
Frasinski
L J
LJ
Merdji
H
H
Dinu
L C
LC
Monchicourt
P
P
Breger
P
P
Kovacev
M
M
Auguste
T
T
Carré
B
B
Muller
H G
HG
Agostini
P
P
Salières
P
P