Department of Micro- and Nanotechnology, Technical University of Denmark ![]() However, graphene unique properties involving the relativistic character of its charge carriers are rarely utilized, specifically at application-relevant conditions. In particular, the presence of negative refraction of Dirac fermions in graphene [2] is of particular relevance to develop novel quantum devices based on electron optics. The present work addresses the guidance of relativistic carriers by employing periodic potential modulation (np junctions); demonstrated by the anisotropic propagation of charge carriers in these systems. Guiding effects survive even at ambient conditions, crucial for the technological development of novel electronic systems based on Dirac-fermions. [1] Palacios, T. Graphene electronics: Thinking outside the silicon box. Nature Nanotech. 6, 464 (2011). [2] Lee, G-H.; Park, G-H.& Lee. H-J. Observation of negative refraction of Dirac fermions in graphene. Nature Physics, 11, 925 ![]() |