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HL: Fachverband Halbleiterphysik

HL 17: 2D Semiconductors and van der Waals Heterostructures III

HL 17.10: Vortrag

Dienstag, 18. März 2025, 12:00–12:15, H15

Ultrafast mid-infrared interferometric photocurrents in graphene-based two-terminal devices for femtosecond autocorrelation — •Sebastian Loy^1,2, Nina Pettinger^1,2, Johannes Schmuck^1,2, Xiaoyi Zhou^1,2, Sergey Zherebtsov^1,2, Christoph Kastl^1,2, and Alexander Holleitner^1,2 — ¹Walter Schottky Institute and Physics Department, Technical University of Munich, Am Coulombwall 4a, 85748 Garching, Germany — ²Munich Center of Quantum Science and Technology (MCQST), Schellingstr. 4, 80799 Munich, Germany

We present the autocorrelation of femtosecond mid-IR pulses with wavelengths ranging from 5.5 µm to 14 µm and pulse durations of approximately 100 fs on graphene-based two-terminal devices. The results indicate that the interaction between the electric field and optoelectronic dynamics at the metal-graphene interface underlies the principle of ultrafast detection. Our approach stands out due to the ease of nanofabricating graphene two-terminal optoelectronic devices and their inherent robustness [1].

[1] Nina Pettinger et al., accepted (2024).

Keywords: mid-infrared; photocurrent; graphene