Adiabatic control of surface plasmon-polaritons in a 3-layers graphene curved configuration

TL;DR

This paper introduces a novel method for controlling surface plasmon-polaritons in a three-layer graphene structure using adiabatic techniques, enabling efficient and robust energy transfer in curved configurations.

Contribution

It applies coupled mode theory and STIRAP quantum control to design a new graphene-based directional coupler with high efficiency and robustness.

Findings

SPP transfer efficiency exceeds 90%

Coupling remains robust against device length variations

Proposed design demonstrates potential for integrated plasmonic circuits

Abstract

In this paper, we utilize coupled mode theory (CMT) to model the coupling between surface plasmon-polaritons (SPPs) between multiple graphene sheets. By using the Stimulated Raman Adiabatic Passage (STIRAP) Quantum Control Technique, we propose a novel directional coupler based on SPPs evolution in three layers of graphene sheets in some curved configuration. Our calculated results show that the SPP can be transferred efficiently from the input graphene sheet to the output graphene sheet, and the coupling is also robust that it is not sensitive to the length of the device.