DESY-Center for Free Electron Laser Science
The emergence of computers in the last century and the surge of computation technology have revolutionized the research progress through advanced simulation tools. Research methodologies based on electromagnetic fields and waves, as the paramount method for investigating novel phenomena, were similarly affected by the simulation technology. The presentation aims to show few of the numerous research schemes where computational electrodynamics is playing a significant supportive role.
Metamaterials and metasurfaces have shown strong promise to scientists and engineers to realize materials with properties not found in nature. One of the outcomes of this research field was metamaterial absorbers, where thin wideband radar absorbers are pursued. Invent of 2D materials in the last years had shown strong potentials for developing tunable metasurfaces, whose simulation paves the way toward new functioning devices. Studying the sophisticated ultrafast dynamics of field-emitting electron sources is merely possible with advanced computational tools. Subsequently, the recently triggered project AXSIS (Frontiers in Attosecond X-ray Science: Imaging and Spectroscopy) will be introduced, where the role of computational electrodynamics for simulating, designing, and implementing a compact X-ray source is presented. In the AXSIS project at CFEL-Hamburg, funded by the European Research Council, we develop compact fully coherent, THz driven, attosecond X-ray source in conjunction with the new method of attosecond serial X-ray crystallography and spectroscopy, to give a full description of ultrafast processes atomically resolved in real space and on the electronic energy landscape. After a brief introduction of the AXSIS project, the accomplished tasks towards the complete simulation and design of the coherent X-ray source are presented.