Berlin 2024 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 36: Poster III
HL 36.3: Poster
Wednesday, March 20, 2024, 18:00–20:30, Poster E
Time-resolved Faraday ellipticity on multilayer WSe2 — •Anna Weindl1, Jennifer Lehner1, Simon Raiber1, Kenji Watanabe2, Takashi Taniguchi3, and Christian Schüller1 — 1Institut für Experimentelle und Angewandte Physik, Universität Regensburg, 93053 Regensburg — 2Research Center for Functional Materials, National Institute for Materials Science, Tsukuba Ibaraki 305-0044, Japan — 3International Center for Materials Nanoarchitectonics, National Institute for Materials Science, Tsukuba Ibaraki 305-0044, Japan
We report about our time-resolved Faraday ellipticity (TRFE) experiments on mulitlayers of the transition metal dichalcogenid WSe2. In a continuation of our recent work by Raiber et al. [1], we aim to investigate the nature of the temporal dynamics in WSe2 multilayers. These previous results have shown that pseudospin oscillations appear in the TRFE signal when we apply an in-plane magnetic field to our samples. Now we try to characterize and manipulate these oscillations by playing with different experiment parameters. Varying the angle of the magnetic field, adding an electric field or investigating the layer dependence are examples for our toolbox of parameters to gain further insights in the dynamics of the multilayers.
[1] S. Raiber, P. E. Faria Junior, D. Falter, S. Feldl, P. Marzena, K. Watanabe, T. Taniguchi, J. Fabian, C. Schüller. Ultrafast pseudospin quantum beats in multilayer WSe2 and MoSe2, Nat. Commun. 13, 4997 (2022).
Keywords: Time-resolved Faraday spectroscopy; gated structures; TMDC; multilayer; magnetic field