Singleshot polychromatic coherent diffractive imaging with a high-order harmonic source [article]

Erik Malm, Hampus Wikmark, Bastian Pfau, Pablo Villanueva-Perez, Piotr Rudawski, Jasper Peschel, Sylvain Maclot, Michael Schneider, Stefan Eisebitt, Anders Mikkelsen, Anne L'Huillier, Per Johnsson (+2 others)
2020
Singleshot polychromatic coherent diffractive imaging is performed with a high-intensity high-order harmonic generation source. The coherence properties are analyzed and several reconstructions show the shot-to-shot fluctuations of the incident beam wavefront. The method is based on a multi-step approach. First, the spectrum is extracted from double-slit diffraction data. The spectrum is used as input to extract the monochromatic sample diffraction pattern, then phase retrieval is performed on
more » ... he quasi-monochromatic data to obtain the sample's exit surface wave. Reconstructions based on guided error reduction (ER) and alternating direction method of multipliers (ADMM) are compared. ADMM allows additional penalty terms to be included in the cost functional to promote sparsity within the reconstruction.
doi:10.14279/depositonce-10037 fatcat:ttdlhljzsbhgfdvbv6rz5yosgy