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

Abstract

We propose a novel ultrafast electronic switching device based on dual-graphene electron waveguides, in analogy to the optical dual-channel waveguide device. The design utilizes the principle of coherent quantum mechanical tunneling of Rabi oscillations between the two graphene electron waveguides. Based on a modified coupled mode theory, we construct a theoretical model to analyse the device characteristics, and predict that the swtiching speed is faster than 1 ps. Due to the long mean free path of electrons in graphene at room temperature, the proposed design avoids the limitation of low temperature operation required in the normal semiconductor quantum-well structure. The layout of the our design is similar to that of a standard CMOS transistor that should be readily fabricated with current state-of-art nanotechnology.

6 pages, 4 figures

References in corpus (13)

• Giant Intrinsic Carrier Mobilities in Graphene and Its Bilayer
• Substrate-induced band gap opening in epitaxial graphene
• A self-consistent theory for graphene transport
• Graphene field-effect-transistors with high on/off current ratio and large transport band gap at room temperature
• Room temperature magnetic order on zigzag edges of narrow graphene nanoribbons
• Strong Coulomb drag and broken symmetry in double-layer graphene
• Electron optics with ballistic graphene junctions
• Gate-controlled Guiding of Electrons in Graphene
• Electron Thermionic Emission from Graphene and a Thermionic Energy Converter
• Guided modes in graphene waveguides
• Coulomb Drag in Graphene
• Current-temperature scaling for a Schottky interface with non-parabolic energy dispersion
• Complete achromatic optical switching between two waveguides with a sign flip of the phase mismatch

Cited by in corpus (4)

• Guiding Dirac fermions in graphene with a carbon nanotube
• Adiabatic following of terahertz surface plasmon-polaritons based on tri-layered corrugated thin film coupler
• Population transfer via a dissipative structural continuum
• Mapping borophene onto graphene: Quasi-exact solutions for guiding potentials in tilted Dirac cones