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Strong field ionization of atoms and molecules is often viewed as electron tunneling through the barrier created by the laser field and core potential. In multielectron systems new tunneling channels driven by electron correlations may arise leading to complex attosecond dynamics of electron rearrangement [1]. High harmonic spectroscopy [2] provides an opportunity to record these complex dynamics...
One of the key goals of attosecond spectroscopy is to time resolve the multielectron rearrangement that takes place when an electron is removed from a molecule using a short laser pulse. While XUV pulses address core electrons, infrared pulses address valence electrons, and can be used to excite electron dynamics in the valence shells via a strong field ionization process [1].
We implement a novel parametric waveform synthesizer based on three carrier-envelope-phase-locked femtosecond pulses with tunable commensurate/-incommensurate carrier-frequencies. Directional electron emission asymmetry in such light-fields is shown to cause the generation of tunable Brunel-type sideband radiation.
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