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.
@article{arxiv.1702.03748,
title = {A new coupling mechanism between two graphene electron waveguides for ultrafast switching},
author = {Wei Huang and Shi-Jun Liang and Elica Kyoseva and Lay Kee Ang},
journal= {arXiv preprint arXiv:1702.03748},
year = {2019}
}