Berlin 2018 – wissenschaftliches Programm
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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur
KFM 7: Microstructure of thin films / TEM-based Nanoanalysis
KFM 7.7: Vortrag
Montag, 12. März 2018, 17:20–17:40, E 124
Generation of Attosecond Electron Pulse Trains for Ultrafast Transmission Electron Microscopy — •Christopher Rathje1,3, Katharina E. Priebe1, Sergey V. Yalunin1, Armin Feist1, Thorsten Hohage2, Sascha Schäfer1,3, and Claus Ropers1 — 1lV. Physical Institute - Solids and Nanostructures, University of Göttingen, Germany — 2Institute for Numerical and Applied Mathematics, University of Göttingen, Germany — 3Institute of Physics, University of Oldenburg, Germany
Ultrafast transmission electron microscopy (UTEM) allows for the investigation of dynamics with both nanometer spatial and femtosecond temporal resolution. The highly coherent electron beam of the Göttingen UTEM [1] facilitates detailed studies of inelastic electron-photon scattering [2-4]. Here, we employ intense phase-locked optical fields to coherently control and characterize the longitudinal electron wave function [5]. In particular, we experimentally demonstrate the self-compression of electron pulses due to dispersive pulse propagation into a train of attosecond bursts with peak widths of 655 as [5]. Such pulse trains will enable the study of nanoscale field-driven processes at optical frequencies in UTEM.
[1] Feist et al., Ultramicroscopy 176 (2017) [2] Barwick et al., Nature 462, 902 (2009) [3] Feist et al., Nature 521, 200-203 (2015) [4] Echternkamp et al., Nat. Phys. 12, 1000-1004 (2016) [5] Priebe, Rathje et al., Nat. Photonics 11, 793-797 (2017)