Compressed Sensing in Ptychography and Transmission Electron Microscopy

• Applicant: Dr. Wouter van den Broek, Ph.D.
• Subject Area: Synthesis and Properties of Functional Materials
• Term: from 2016 to 2021
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 319898174

This project uses compressed sensing to improve object retrieval from ptychographic data sets consisting out of HRTEM images and diffraction patterns, and to speed up data recording and thus decrease electron dose and specimen damage. More specifically, a SEM will be equipped with fast phase imaging in transmission, and super-resolution will be attained in the TEM by near-field ptychography. After having validated the techniques with standard samples of increasing complexity, the challenging case of metal and metal oxide clusters synthesized in the gas phase by laser evaporation cluster sources is taken on.

• DFG Programme: Research Grants
• Co-Investigators: Dr. Martin Albrecht; Privatdozent Dr. Friedrich Esch; Professor Dr. Ulrich Heiz; Professor Dr. Christoph Tobias Koch, Ph.D.; Dr. Florian Schweinberger