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A: Fachverband Atomphysik
A 11: Posters: Interaction with attosecond and VUV-light
A 11.1: Poster
Tuesday, March 11, 2008, 16:30–18:30, Poster C3
Attosecond control of the electron position — •Paula Riviere, Camilo Ruiz, Andreas Becker, and Jan-Michael Rost — MPIPKS, Dresden
Attosecond pump-probe experiments are a promising tool for studying the structure and electron dynamics of atomic systems. With them, the control of ultrafast charge transfer between two nuclei in a dissociating molecule is possible. In this work we propose a theoretical scheme for such a process using realistic experimental parameters.
In this scheme, a pump-probe set of attosecond pulses is used to transfer charge between the two nuclei in a dissociative diatomic molecule (H2+, r0∼ 40 a.u.), The charge is initially located at one of the nuclei. The pump pulse can ionize the electron, which moves in the continuum until the probe pulse induces its reabsorption by the second nucleus, if the delay between the pulses is optimal.
We also propose a method for optimizing the absorption in the case of fixed delays, the usual experimental situation, by means of an infrared pulse, whose function is to accelerate or decelerate the electron as it covers the distance between the nuclei.
Finally, we present results for the case of an attosecond pulse train, in which the charge transfer is enhanced due to the consecutive effect of the different pulses.
Apart from the possibility of transferring charge between the nuclei, this process could also be useful to measure atomic distances.