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HL: Fachverband Halbleiterphysik
HL 11: Ultra-fast Phenomena I
HL 11.1: Vortrag
Montag, 17. März 2025, 16:00–16:15, H14
Femtosecond Photocurrents in 2D materials — •Björn Sinz1,2, Johannes Schmuck1,2, Johannes Gröbmeyer1,2, Nina Pettinger1,2, Sergey Zherebtsov1,2, and Alexander Holleitner1,2 — 1Walter Schottky Institute and Physics Department, TU Munich, Munich, Germany — 2Munich Center of Quantum Science and Technology (MCQST), Munich, Germany)
Light-field-driven currents have already been investigated in graphene by ultrashort laser pulses. In the strong-field regime, the electric field directly generates such photocurrents on a time scale of femtoseconds, whereas in the weak-field regime other photogeneration processes like the photo-thermoelectric effect dominate [1]. The different photocurrents are not limited to graphene but are also predicted for transition metal dichalcogenide (TMDC) monolayers. We report on femtosecond-pulse driven photocurrents in monolayer TMDC samples.
[1]: J. Gröbmeyer, P. Zimmermann, B. Huet, J. A. Robinson, A. W. Holleitner; Space-charge limited and ultrafast dynamics in graphene-based nano-gaps. Appl. Phys. Lett. 3 July 2023; 123 (1): 013504. https://doi.org/10.1063/5.0154152
Keywords: ultrafast; photocurrent; femtosecond electronics; 2D material; TMDC