Rostock 2019 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 33: Interaction with strong and short laser pulses
A 33.2: Poster
Donnerstag, 14. März 2019, 16:15–18:15, S Fobau Physik
Above-threshold ionization beyond dipole approximation in the SFA — •Birger Böning1,2, Willi Paufler1,2, and Stephan Fritzsche1,2 — 1Helmholtz-Institut Jena, Germany — 2Theoretisch-Physikalisches Institut, Friedrich-Schiller-Universität Jena, Germany
We theoretically investigate non-dipole effects in the above-threshold ionization (ATI) of atoms using the strong-field approximation (SFA). To this extend, we construct Volkov-like continuum wavefunctions of the photoelectron in laser fields with arbitrary spatial dependence. Based on previous work, we show how to construct these solutions to the Schrödinger equation for an electron in a laser field that can be written as a continuous superposition of plane waves. As an application, we perform detailed computations of ATI spectra within the SFA and discuss contributions due to non-dipole interactions. In particular, the peak shift of the spectra in laser propagation direction for mid-IR fields is shown.