Abstract
SynopsisWe present the first experimental evidence which qualitatively shows that frustrated tunnel ionization results in a larger number of excited neutrals per a tunnelling event for 6 fs pulses compared to 30 fs pulses. In addition, we also observe a less severe dependence on elliptical polarization for the 6 fs pulses. Furthermore, by varying the carrier envelope phase of the shorter pulse, we observe a modulation in the yield of excited neutrals which indicates possible control of electron trajectories.
Highlights
To cite this article: D Chetty et al 2020 J
Synopsis We present the first experimental evidence which qualitatively shows that frustrated tunnel ionization results in a larger number of excited neutrals per a tunnelling event for 6 fs pulses compared to 30 fs pulses
The fact that a strong laser field can perturb the atomic potential of an atom allowing an electron to tunnel ionize lays the foundation for a rich set of phenomena. One such phenomenon is that of frustrated tunnel ionization (FTI) where the tunnelled electron is not ionized completely but is accelerated back towards the vicinity of the parent ion and recaptured into an excited state by the Coulomb field [1]
Summary
To cite this article: D Chetty et al 2020 J. Conference Title Journal of Physics: Conference Series Synopsis We present the first experimental evidence which qualitatively shows that frustrated tunnel ionization results in a larger number of excited neutrals per a tunnelling event for 6 fs pulses compared to 30 fs pulses.
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