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HL: Fachverband Halbleiterphysik
HL 8: Ultrafast Phenomena I
HL 8.1: Vortrag
Montag, 18. März 2024, 15:00–15:15, EW 015
Ultrafast Microbeam Diffraction at 15-keV — •Johannes Otto1,2,3, Leon Brauns1,2, Rudolf Haindl1,2, Jan Gerrit Horstmann1,2,4, Armin Feist1,2, Murat Sivis1,2, and Claus Ropers1,2,3 — 1Department of Ultrafast Dynamics, Max Planck Institute for Multidisciplinary Sciences, Göttingen, Germany — 24th Physical Institute, University of Göttingen, Göttingen, Germany — 3Max Planck School of Photonics — 4Present address: Department of Materials, ETH Zürich, Zürich, Switzerland
Ultrafast electron diffraction facilitates the investigation of non-equilibrium structural dynamics [1,2]. In this contribution, we present the development and application of a dedicated setup for microbeam ultrafast electron diffraction (µ-UED), enabling the study of particularly small samples and heterostructures, and promoting experiments on the influence of structural inhomogeneities in non-equilibrium phenomena. We report on the characterization of the spatial and temporal electron beam properties and discuss first time-resolved experiments on a laser-induced structural phase transformation in 1-T tantalum disulfide.
[1] G. Sciaini and R. J. D. Miller, Rep. Prog. Phys. 74, 096101 (2011).
[2] D. Filippetto et al., Rev. Mod. Phys. 94, 045004 (2022).
Keywords: Ultrafast electron diffraction; Structural phase transitions; Charge-density waves; Strongly-correlated materials