SAMOP 2021 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 5: Atomic clusters (together with MO)
A 5.5: Poster
Dienstag, 21. September 2021, 16:30–18:30, P
Quantum Coherent Diffractive Imaging — •Björn Kruse1, Benjamin Liewehr1, Christian Peltz1, and Thomas Fennel1,2 — 1Institute for Physics, University of Rostock, Albert-Einstein-Str. 23, D-18059 Rostock, Germany — 2Max-Born-Institut, Max-Born-Str. 2A, D-12489 Berlin, Germany
Coherent diffractive imaging (CDI) of isolated helium nanodroplets has been successfully demonstrated with a lab-based HHG source [1] operating in the vicinity of the 1s - 2p transition of helium. To reconstruct the shape and orientation of nanoparticles, CDI experiments have so far been analyzed in terms of a classical linear response description [2]. However, for strong laser fields and especially for resonant excitation, population dynamics of bound electrons and stimulated emissions may become important, violating the assumptions underlying a linear and classical description.
We developed a density matrix-based scattering model in order to include such quantum effects in the local medium response and explore the transition from linear to non-linear CDI for the resonant scattering from Helium nanodroplets [3]. The resulting substantial departures from the linear response case for already experimentally reachable pulse parameters leads to the proposal of quantum coherent diffractive imaging (QCDI) as a promising novel branch in strong-field XUV and x-ray physics.
[1] D. Rupp et al., Nat. Commun. 8, 493 (2017)
[2] I. Barke et al., Nat. Commun. 6, 6187 (2015)
[3] B. Kruse et al., J. Phys. Photonics 2, 024007 (2020)