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We propose a novel ultrafast electronic switching device based ondual-graphene electron waveguides, in analogy to the optical dual-channelwaveguide device. The design utilizes the principle of coherent quantummechanical tunneling of Rabi oscillations between the two graphene electronwaveguides. Based on a modified coupled mode theory, we construct a theoreticalmodel to analyse the device characteristics, and predict that the swtichingspeed is faster than 1 ps. Due to the long mean free path of electrons ingraphene at room temperature, the proposed design avoids the limitation of lowtemperature operation required in the normal semiconductor quantum-wellstructure. The layout of the our design is similar to that of a standard CMOStransistor that should be readily fabricated with current state-of-artnanotechnology.

A new coupling mechanism between two graphene electron waveguides for ultrafast switching