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Updated: Jan 22, 2026

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Visible-light Induced Reduction of Graphene Oxide Using Plasmonic Nanoparticle
Published on: September 22, 2015
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Graphene-based meta-coupler for direction-controllable emission of surface plasmons
Optics Letters
|July 2, 2019
Summary
Gradient metasurfaces enable efficient surface plasmon (SP) and propagating wave (PW) conversion. Graphene-based meta-couplers offer dynamic control over SP-PW conversion, enabling tunable radiation angles without structural redesign.
Area of Science:
- Photonics
- Metasurfaces
- Plasmonics
Background:
- Gradient metasurfaces are effective for surface plasmon (SP) and propagating wave (PW) conversion.
- Current SP-PW couplers lack flexibility for active control, limiting practical applications.
Purpose of the Study:
- To propose and demonstrate graphene-based meta-couplers for dynamic SP-PW conversion.
- To achieve tunable control over SP-PW conversion using graphene's chemical potential.
Main Methods:
- Utilized graphene ribbon and block-based meta-couplers.
- Modulated graphene's chemical potential to tune the phase shift of scattering SPs.
- Investigated both in-plane and out-of-plane SP-PW conversions.
Main Results:
- Demonstrated dynamic SP-PW conversion with graphene meta-couplers.
- Achieved conversion of SPs to single or two beams of PWs.
- Showcased variable radiation angles by tuning graphene's chemical potential without structural re-optimization.
Conclusions:
- Graphene-based meta-couplers provide a flexible platform for active control of SP-PW conversion.
- Tunable optical properties of graphene enable dynamic control over light manipulation in photonic devices.
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