Gate tuneable beamsplitter in ballistic graphene

Peter Rickhaus, Péter Makk, Ming Hao Liu, Klaus Richter, Christian Schönenberger

Research output: Contribution to journalArticle

25 Citations (Scopus)

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 μm. The herein presented beamsplitter device can form the basis of electron-optic interferometers in graphene.

Original languageEnglish
Article number251901
JournalApplied Physics Letters
Volume107
Issue number25
DOIs
Publication statusPublished - 2015 Dec 21

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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    Rickhaus, P., Makk, P., Liu, M. H., Richter, K., & Schönenberger, C. (2015). Gate tuneable beamsplitter in ballistic graphene. Applied Physics Letters, 107(25), [251901]. https://doi.org/10.1063/1.4938073