collaborators

5 papers

physics.optics2026

Dichography: Two-frame Ultrafast Imaging from a Single Diffraction Pattern

Linos Hecht, Andre Al Haddad, Björn Bastian +47

We experimentally demonstrate that pairs of time-delayed ultrabright and ultrashort X-ray pulses of two different colors, delivered by modern X-ray Free Electron Lasers, can provid…

physics.optics2026

Laser-induced transient opacity in helium nanodroplets probed by single-shot coherent diffraction

Julian C. Schäfer-Zimmermann, Tom von Scheven, Katharina Kolatzki +13

Single-shot coherent diffractive imaging (CDI) with intense short-wavelength light pulses enables the structural characterization of individual nanoparticles in free flight with hi…

physics.optics2025

Model-free pattern separation of two-color ultrafast X-ray diffraction

Linos Hecht, Yevheniy Ovcharenko, Asbjørn Ø. Lægdsmand +33

Two-color X-ray imaging with Free Electron Laser pulses offers a powerful approach for probing ultrafast structural dynamics in nanoscale systems, combining (near-)atomic spatial r…

physics.optics2025

Nonlinear reversal of photo-excitation on the attosecond time scale improves ultrafast x-ray diffraction images

Anatoli Ulmer, Phay J. Ho, Bruno Langbehn +28

The advent of isolated and intense sub-femtosecond X-ray pulses enables tracking of quantummechanical motion of electrons in molecules and solids. The combination of X-ray spectros…

physics.optics2025

SPRING: an effective and reliable framework for image reconstruction in single-particle Coherent Diffraction Imaging

Alessandro Colombo, Mario Sauppe, Andre Al Haddad +40

Coherent Diffraction Imaging (CDI) is an experimental technique to gain images of isolated structures by recording the light scattered off the sample. In principle, the sample dens…