Freiburg 2024 – scientific programme
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MO: Fachverband Molekülphysik
MO 4: Strong-field Ionization and Imaging (joint session MO/A)
MO 4.2: Talk
Monday, March 11, 2024, 17:15–17:30, HS 3044
Theoretical semiclassical modelling of Laser Induced Electron Diffraction (LIED) — •Álvaro Fernández1,2, Armin Iske3, Andrey Yachmenev1,4, and Jochen Küpper1,2,4 — 1Deutsches Elektronen-Synchrotron DESY — 2Department of Physics, Universität Hamburg — 3Department of Mathematics, Universität Hamburg — 4Center for Ultrafast Imaging, Universität Hamburg
Experimental techniques for molecular imaging underwent a very fast development in the past decades. From a broad range of novel techniques, laser induced electron diffraction (LIED) [1] stands out because of its high spatiotemporal resolution, high cross section, and lack of structural damage compared to other modern techniques. However, the complexity of this technique causes the necessity of its own theory to understand the results. A general and accurate quantum simulation of the experiment is, to this date, unfeasible and, for this reason, semiclassical models [2] have arised as useful predicting algorithms.
In this talk, a comprehensive analysis of the LIED experiment using a semiclassical model will be given. With this model, we can obtain efficient simulations of the outcome for flexible configurations of molecular geometries. The quality of the results will depend on several factors such as the choice of ionisation theory or electrostatic potential model. An study of the relevance of these factors in the computation of effective cross section for high energy electrons will be presented during the talk.
[1] Karamatskos, E. T, et al., J. Chem. Phys., 150, 24 (2019)
[2] Wiese, J., et al., Phys. Rev. Research, 3, 013089, (2021)
Keywords: Strong-field; Laser-induced electron diffraction; Semiclassical models; Ultrafast Electron Dynamics