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Reflectionless plasmonic right-angled waveguide bend and divider using graphene and transformation optics
Optics Express
|April 6, 2021
Summary
This study introduces graphene-based plasmonic waveguide components for terahertz devices. These components efficiently guide surface plasmon polaritons around 90-degree bends and through T-shaped dividers.
Area of Science:
- Photonics and Plasmonics
- Materials Science
- Electromagnetics
Background:
- Surface plasmon polaritons (SPPs) are crucial for nanoscale optical phenomena.
- Guiding SPPs around sharp bends and dividing them efficiently remains a challenge in terahertz (THz) applications.
- Existing methods often suffer from losses or fabrication complexities.
Purpose of the Study:
- To propose and design novel plasmonic waveguide components for THz applications.
- To achieve efficient guiding of SPPs in right-angled bends and T-shaped dividers.
- To utilize graphene as a tunable material for realizing transformation optics in the THz regime.
Main Methods:
- Employed the Transformation Optics (TO) approach to derive the required material parameters.
- Designed transformation media with continuous refractive index profiles.
- Utilized graphene as the active material to realize these media in the terahertz frequency range.
Main Results:
- Successfully designed a plasmonic right-angled waveguide bend.
- Developed a plasmonic T-shaped waveguide divider.
- Demonstrated the capability of graphene to guide SPP propagation effectively on 90-degree curves.
Conclusions:
- The proposed graphene-based plasmonic components offer a promising solution for THz device integration.
- These components enable efficient manipulation of SPPs, paving the way for advanced THz integrated circuits.
- The continuous refractive index media realized with graphene are key to the performance of these devices.
