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Issue 20, 2020
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High-performance light transmission based on graphene plasmonic waveguides

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Deep-subwavelength optical field localization and ultra-long-range transmission are crucial for nanoscale photonics integration. However, the transmission performances of plasmon modes are restricted by the trade-off between the modal confinement and loss. Here we design a graphene-coated nanowire-based plasmonic waveguide to achieve unprecedented optical waveguiding performances, which is fully compatible with the silicon-on-insulator platform. The graphene plasmon modes in the proposed structure are systematically evaluated in terms of geometric and physical parameters. Benefiting from the distinctive modal field distribution caused by the silicon nano-rib, the proposed graphene plasmonic waveguide could support a deep-subwavelength plasmon mode with ultra-low loss, which outperforms most graphene-coated nanowire-based waveguides in the mid-infrared band. Also, the modal properties are quite robust against fabrication imperfections and the proposed configuration exhibits very low mode crosstalk. The proposed waveguiding approach paves the way for potential applications in tunable integrated photonic devices at the nanoscale.

Graphical abstract: High-performance light transmission based on graphene plasmonic waveguides

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Article information

04 Mar 2020
14 Apr 2020
First published
15 Apr 2020

J. Mater. Chem. C, 2020,8, 6832-6838
Article type

High-performance light transmission based on graphene plasmonic waveguides

D. Teng, K. Wang, Q. Huan, W. Chen and Z. Li, J. Mater. Chem. C, 2020, 8, 6832
DOI: 10.1039/D0TC01125H

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