SAMOP 2023 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 45: Photonics III
Q 45.2: Vortrag
Donnerstag, 9. März 2023, 11:15–11:30, A320
Incoherent diffractive imaging of (non)regular structures — •Sebastian Karl1, Stefan Richter1, Manuel Bojer1, Fabian Trost2, Kartik Ayyer3, Henry Chapman2, Ralf Röhlsberger4, and Joachim von Zanthier1 — 1QOQI, FAU Erlangen Nürnberg, Germany — 2Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany — 3Max Planck Institute for the Structure and Dynamics of Matter, Hamburg, Germany — 4Helmholtz-Institut Jena, Germany
X-ray crystallography relies on coherent scattering for high resolution structure determination. However, often the predominant scattering mechanism is an incoherent process like fluorescence, introducing severe background in the coherent diffractogram. Incoherent diffractive imaging (IDI) aims to use this incoherently scattered light for structure determination by measuring second order correlations in the far field [1]. While in theory single shot 3d imaging would be possible using IDI, careful theoretical examinations place thresholds on its feasibility [2,3]. IDI has been implemented at the European XFEL using metal foils. After evaluations for regular structures have been performed [4], we discuss the evaluation progress for non-regular structures and comment on the possibility of ab initio phasing using third order correlations on this dataset [5].
[1] A. Classen et al, PRL 119, 053401, 2017 [2] F. Trost et al., New J. Phys. 22, 083070, 2020 [3] L. M. Lohse et al., Acta Cryst. A 77, 480-496, 2021 [4] F. Trost et al., to be published [5] N. Peard et al., arXiv:2210.03793