Extreme ultraviolet Fourier-transform spectroscopy with high order harmonics.
We demonstrate a new scheme for extreme ultraviolet (xuv) Fourier-transform spectroscopy based on the generation of two phase-locked high-harmonic beams. It allows us to measure for the first time interferograms at wavelengths as short as 90 nm, and open the perspective of performing high-resolution Fourier-transform absorption spectroscopy in the xuv. Our measurements also demonstrate that a precise control of the relative phase of harmonic pulses can be obtained with an accuracy on an attosecond time scale, of importance for future xuv pump-xuv probe attosecond spectroscopy.
Kovacev
M
M
CEA/DSM/DRECAM/SPAM, bât. 522, Centre d'Etudes de Saclay, 91191 Gif-sur-Yvette, France.
Fomichev
S V
SV
Priori
E
E
Mairesse
Y
Y
Merdji
H
H
Monchicourt
P
P
Breger
P
P
Norin
J
J
Persson
A
A
L'Huillier
A
A
Wahlström
C-G
CG
Carré
B
B
Salières
P
P