Berlin 2018 – scientific programme
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O: Fachverband Oberflächenphysik
O 83: Poster Focus Session: Structural Dynamics in Nanoscale Materials, Probed by Ultrafast Electron Pulses
O 83.8: Poster
Wednesday, March 14, 2018, 18:15–20:30, Poster A
Ultrafast transmission electron microscopy using laser-triggered field emitters — •Thomas Danz1, Armin Feist1, Nara Rubiano da Silva1, Marcel Möller1, Nora Bach1, Sascha Schäfer1,2, and Claus Ropers1 — 1IV. Physical Institute – Solids and Nanostructures, University of Göttingen, Germany — 2Institute of Physics, University of Oldenburg, Germany
Ultrafast transmission electron microscopy (UTEM) is a promising approach to investigate structural, electronic, and magnetic dynamics with nanometer spatial and femtosecond temporal resolution in a laser pump/electron probe scheme using the versatile imaging, diffraction, and spectroscopy capabilities of such an instrument [1–3].
The pulsed electron source of the Göttingen UTEM project employs linear photoemission from a nanoscopic Schottky emitter, delivering highly coherent electron pulses with down to 200 fs pulse duration, 0.6 eV energy width, and sub-1 nm focused beam diameter [4]. Here, we discuss the present status of the Göttingen UTEM along with selected applications in ultrafast electron imaging and diffraction.
[1] A. H. Zewail, Science 328, 187 (2010).
[2] A. Feist et al., arXiv:1709.02805, accepted for publication in Structural Dynamics.
[3] N. Rubiano da Silva et al., arXiv:1710.03307.
[4] A. Feist et al., Ultramicroscopy 176, 63 (2017).