Erlangen 2022 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 10: Interaction with strong or short laser pulses
A 10.3: Poster
Dienstag, 15. März 2022, 16:30–18:30, P
Non-sequential double ionization of Ne by elliptically polarized laser pulses — •Fang Liu1,2,3, ZhangJin Chen4, Birger Böning1,2,3, and Stephan Fritzsche1,2,3 — 1Helmholtz Institute Jena, Jena, Germany — 2FSU, Jena, Germany — 3GSI, Darmstadt, Germany — 4Shantou University, Shantou, China
We show through simulation that an improved quantitative re-scattering model (QRS)[1] can successfully predict the nonsequential double ionization (NSDI) process by intense elliptically polarized laser pulses. Using the QRS model, we calculate the correlated two-electron and ion momentum distributions of NSDI of Ne exposed to intense elliptically polarized laser pulses with a wavelength of 788 nm at a peak intensity of 5.0 × 1014 W/cm2. We analyze the asymmetry in the doubly charged ion momentum spectra that were observed by H. Kang et al.[2] in the transition from linearly to elliptically polarized laser pulses. Our model reproduces their experimental data well. In addition, we find that this ellipticity-dependent asymmetry is due to the drift velocity along the minor axis of the polarization ellipse. It is indicated that the correlated electron momentum distributions along the minor axis provide access to the subcycle dynamics of recollision and distinguish recollisions before and after the zero crossing of the field. Futhermore, our results demonstrate that the NSDI process can be driven by the elliptically polarized laser pulses.
[1]Z. Chen et at., Phys. Rev. Lett. 79, 033409 (2009).
[2]H. Kang et at., Phys. Rev. Lett. 120, 223204 (2018).