Coherent Graphene Devices: Movable Mirrors, Buffers and Memories

摘要

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