Coherent Graphene Devices: Movable Mirrors, Buffers and Memories

Details Coherent Graphene Devices: Movable Mirrors, Buffers and Memories Coherent Graphene Devices: Movable Mirrors, Buffers and Memories

2008-04-14

arxiv.org/abs/0804.2225v2

Physical Review B 81, 115441 (2010)

Physics

Condensed Matter

Other Condensed Matter

12 pages, 5 figures

Scientific paper

10.1103/PhysRevB.81.115441

We theoretically report that, at a sharp electrostatic step potential in graphene, massless Dirac fermions can obtain Goos-H\"{a}nchen-like shifts under total internal reflection. Based on these results, we study the coherent propagation of the quasiparticles along a sharp graphene \emph{p-n-p} waveguide and derive novel dispersion relations for the guided modes. Consequently, coherent graphene devices (e.g. movable mirrors, buffers and memories) induced only by the electric field effect can be proposed.

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