Abstract
Graphene plasmonic logic gates (GPLGs) with high compaction and simple structure are presented and investigated in this paper. Due to the strong confinement of edge mode graphene surface plasmon polaritons (EGSPPs), it can process optical signal on nanoscale ribbons with both straight and flexible shapes. Three eigen modes of graphene surface plasmon polaritons (GSPPs) are studied from the aspect of their propagation properties, indicating that the symmetric edge-mode (SEM) is an optimal choice for designing the GPLGs. Finally, some basic logic gates, i.e., the XOR and XNOR gates, are demonstrated by employing the SEM. More kind of GPLGs and functional devices are expected to be realized by cascading these basic logic gates.
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