SKM 2023 – scientific programme

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DS: Fachverband Dünne Schichten

DS 1: 2D Materials and their Heterostructures I: Graphene

DS 1.4: Talk

Monday, March 27, 2023, 10:15–10:30, SCH A 316

Ultrafast photo-thermoelectric currents in graphene — •Xiaoyi Zhou, Nina Pettinger, Johannes Gröbmeyer, Philipp Zimmermann, and Alexander Holleitner — Walter Schottky Institut and Physics Department, Technische Universität München, Germany

Graphene as an optoelectronic material has attracted significant attention due to its interesting properties such as fast charge carrier relaxation rates, broadband optical absorption and high carrier mobilities. We apply an ultrafast on-chip pump-probe photocurrent spectroscopy to demonstrate an immediate thermoelectric photocurrent after a femtosecond laser pulse. We demonstrate that gate-tunable graphene junctions can be integrated into THz-circuits, paving the way for graphene-based ultrafast photodetectors and switches.