Femtosecond spectroscopy with vacuum ultraviolet pulse pairs.
We combine different wavelengths from an intense high-order harmonics source with variable delay at the focus of a split-mirror interferometer to conduct pump-probe experiments on gas-phase molecules. We report measurements of the time resolution (<44 fs) and spatial profiles (4 μm × 12 μm) at the focus of the apparatus. We demonstrate the utility of this two-color, high-order-harmonic technique by time resolving molecular hydrogen elimination from C(2)H(4) excited into its absorption band at 161 nm.
Department of Physics, University of California at Berkeley, Berkeley, California 94720, USA. tka3@jila.colorado.edu
T K
TK
Allison
T W
TW
Wright
A M
AM
Stooke
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C
Khurmi
J
J
van Tilborg
Y
Y
Liu
R W
RW
Falcone
A
A
Belkacem