Author: Ulf Kleineberg

Affiliation(s): Ludwig Maximilians University of Munich

Multilayer XUV mirrors serve as key components in the generation of attosecond pulses from high harmonic radiation. Those pulses pave the way to investigate the dynamics of electronic motion in atoms, molecules and nanostructures with a never before achieved precision and thus allow to draw conclusions on the basic underlying physics. We report on our latest achievements and results in quantitatively controlling the important attosecond pulse parameters as pulse length, central energy, bandwidth and spectral phase by means of a-periodic, sometimes ternary multilayer mirrors over large spectral regions. The entire extreme ultraviolet photon energy range currently relevant for High Harmonic emission ranging up to 190 eV is covered by different multilayer designs, an important prerequisite for an experimental usage of a-periodically designed XUV coatings. The ability to control the frequency chirp of an attosecond pulse via the adjustable dispersion of a-periodic multilayer mirrors will be shown for a set of multilayer mirror coatings, optimized for producing positively, negatively and non-chirped pulses with central energies between 105 and 120 eV supporting about 200 as pulses. Attosecond electron streaking in combination with numerical FROG/CRAB retrieval is presented as an ultimate measurement technique to fully characterize the temporal and spectral characteristics of such pulses.

Consider for Oral Presentation?: Yes