Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

DS: Fachverband Dünne Schichten

DS 13: Poster

DS 13.60: Poster

Donnerstag, 20. März 2025, 18:00–20:00, P1

Ultra-fast exciton and charge carrier dynamics in monolayer MoS₂ seen in the transient spatial dielectric function — •Jakob Seyfarth¹, Andy Engel², Noah Stiehm¹, Younes Slimi¹, Lucas Krätschmer¹, Markus Olbrich², Theo Pflug², Alexander Horn², Stefan Krischok¹, and Rüdiger Schmidt-Grund¹ — ¹Fachgebiet Technische Physik I, Technische Universität Ilmenau, Weimarer Straße 32, 98693 Ilmenau, Germany — ²Laserinstitut Hochschule Mittweida, Schillerstraße 10, 09648 Mittweida, Germany

We present the charge carrier dynamics of monolayer MoS₂ on c-cut sapphire measured using pump-probe imaging reflectometry and interferometry with a spatial resolution of  0.65 micrometers and temporal resolution of  40 femtoseconds [1]. The time-resolved spatial dielectric function shows a diffusion which can be related to the dynamics of charge carriers. The dynamics can be attributed to specific events in the band structure of MoS₂ by comparing the results of a specific probe photon energy with previous time-resolved spectroscopic ellipsometry results [2]. References: [1] O. Herrfurth, T. Pflug, M. Olbrich, M. Grundmann, A. Horn, and R. Schmidt-Grund; Femtosecond-time-resolved imaging of the dielectric function of ZnO in the visible to near-IR spectral range; Appl. Phys. Lett. 115, 212103 (2019) [2] L. Krätschmer, Y. Slimi, L. Trefflich, S. Espinoza, M. Rebarz, J. Seyfarth, T. Pflug, M. Olbrich, N. Stiehm, B. Hähnlein, C. Sturm, A. Horn, J. Andreasson, M. Grundmann, S. Krischok, and R. Schmidt-Grund; Ultrafast Exciton and Charge Carrier Dynamics in Monolayer MoS2 Measured with Timeresolved Spectroscopic Ellipsometry; tbp

Keywords: Ultra-fast Dynamics; Monolayer MoS2; Transition Metal Dichalcogenides; Transient Dielectric Function; Exciton Dynamics