Heidelberg 2015 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 23: Progress on Various Topics in Molecular Physics
MO 23.6: Vortrag
Freitag, 27. März 2015, 12:15–12:30, PH/SR106
Diffractive imaging of dissociating molecules using X-ray free-electron lasers — •Fenglin Wang1,2, Stephan Stern1, Henry N. Chapman1,3,4, and Jochen Küpper1,3,4 — 1Center for Free-Electron Laser Science (CFEL), DESY, 22607 Hamburg, Germany — 2PULSE Institute, Stanford University, Stanford, California 94305, USA — 3Department of Physics, University of Hamburg, Luruper Chaussee 149, 22671 Hamburg, Germany — 4Center for Ultrafast Imaging (CUI), University of Hamburg, 22607 Hamburg, Germany
Free-electron lasers (FELs) can provide very intense, ultrashort pulses of coherent X-rays. This allows for diffractive techniques to see single molecules at spatially and temporally atomic resolution (pm and fs). We use ensembles of laser-aligned isolated molecules to demonstrate these imaging techniques with FELs and to record “molecular movies” of structural dynamics in a bottom-up approach. Here, we present a holographic idea that allows to disentangle the multiple simultaneously pathways occurring in the photodissociation of complex molecules. In this fragmentation holography the incoherent contributions from different pathways are directly separable in the Fourier transform of the diffraction patterns. This will enable us to gain access to structural information of fragmenting molecules as a function of pathways and time.