Erlangen 2018 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 22: Posters 3: Experimental and Theoretical Techniques and High Resolution Spectroscopy
MO 22.12: Poster
Donnerstag, 8. März 2018, 16:15–18:15, Zelt West
Laser Induced Electron Diffraction on strongly aligned OCS molecules — •Philipp M. Stammer1, Evangelos Thomas Karamatskos2,3, Sebastian Raabe1, Gildas Goldsztejn1, Andrea Trabattoni2, Terence Mullins2, Sebastian Trippel2,4, Arnaud Rouzée1, and Jochen Küpper2,3,4 — 1Max Born Institute, Berlin, Germany — 2DESY, Hamburg, Germany — 3Universität Hamburg, Germany — 4CUI, Hamburg, Germany
Strong Field Ionization of an atom or molecule is often described in a simple semi-classical picture: an electron is tunnel ionized by the intense laser field, accelerated away from the atom before to be driven back to the parent ion by the oscillating laser field. Elastic recollision with the parent ion is responsible for the apparition of a second plateau in the photoelectron angular distribution that contains diffraction features from which one can extract direct information about the molecular geometry. This effect is used in a technique called Laser Induced Electron Diffraction (LIED).
To image ultrafast molecular dynamics Laser Induced Electron Diffraction has recently emerged as a powerful tool. We performed LIED experiments in strongly aligned OCS molecules and obtain photoelectron distributions for different angles of the laser polarizations with respect to the molecular orientation. The observed large modifications of the well-known holographic and fork structure with the alignment axis orientation will be discussed.