Gate tuneable beamsplitter in ballistic graphene

Abstract

We present a beam splitter in a suspended, ballistic, multiterminal, bilayer graphene device. By using local bottomgates, a p-n interface tilted with respect to the current direction can be formed. We show that the p-n interface acts as a semi-transparent mirror in the bipolar regime and that the reflectance and transmittance of the p-n interface can be tuned by the gate voltages. Moreover, by studying the conductance features appearing in magnetic field, we demonstrate that the position of the p-n interface can be moved by $1\mu$m. The herein presented beamsplitter device can form the basis of electron-optic interferometers in graphene.

13 pages, 4 figures, including supplementary information

References in corpus (14)

• Chiral tunneling and the Klein paradox in graphene
• Micrometer-scale ballistic transport in encapsulated graphene at room temperature
• Quantum interference and Klein tunneling in graphene heterojunctions
• Selective transmission of Dirac electrons and ballistic magnetoresistance of \textit{n-p} junctions in graphene
• Gate-controlled Guiding of Electrons in Graphene
• Snake Trajectories in Ultraclean Graphene p-n Junctions
• Scalable Tight-Binding Model for Graphene
• Fabry-Pérot interference in gapped bilayer graphene with broken anti-Klein tunneling
• Large yield production of high mobility freely suspended graphene electronic devices on a PMGI based organic polymer
• Guiding of Electrons in a Few Mode Ballistic Graphene Channel
• Quantum and classical confinement of resonant states in a trilayer graphene Fabry-Perot interferometer
• Gate tuneable beamsplitter in ballistic graphene
• Fabrication of ballistic suspended graphene with local-gating
• Homogeneity of Bilayer Graphene

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