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HL: Fachverband Halbleiterphysik

HL 28: Poster Session: Graphen; Transport properties; Transport in high magnetic fields / Quantum Hall effect; Metal-semiconductor hybrid systems

HL 28.11: Poster

Montag, 11. März 2013, 16:00–20:00, Poster A

Terahertz-sensitive devices based on epitaxial graphene — •Christian Sorger, Alexander Glas, Stefan Hertel, Sascha Preu, and Heiko B. Weber — Lehrstuhl für Angewandte Physik, Universität Erlangen-Nürnberg, 91058 Erlangen, Germany

Epitaxially grown graphene is a hybrid system comprising graphene as a metal and silicon carbide as a semiconductor. Through patterning the graphene layer by means of local intercalation (i.e. without metallic gates), electronic functionality can be achieved [1].

First, we focus on the transmission of Terahertz radiation through a grid-like, p-n-patterned graphene layer. The physics is predominantly governed by the excitation of plasmons and we currently explore the potential influence of Klein-Tunneling. Secondly, we form Schottky-Diodes following the strategy of reference [1]. When equipped with a metallic antenna, we examine their suitability as Terahertz detectors.

[1] S. Hertel et al., Nature Communications 3, 957 (2012)