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Updated: Jan 29, 2026

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Visible-light Induced Reduction of Graphene Oxide Using Plasmonic Nanoparticle
Published on: September 22, 2015
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Absorption and slow-light analysis based on tunable plasmon-induced transparency in patterned graphene metamaterial
Optics Express
|February 9, 2019
Summary
We designed a novel graphene metamaterial exhibiting tunable terahertz plasmon-induced transparency (PIT). This structure demonstrates efficient terahertz absorption and potential for advanced slow-light devices.
Area of Science:
- * Physics, Materials Science, Electrical Engineering
- * Focus on metamaterials, plasmonics, and terahertz (THz) technology.
Background:
- * Plasmon-induced transparency (PIT) is a quantum interference effect with applications in optical switching and sensing.
- * Graphene's tunable electronic properties make it a promising material for dynamic control of PIT.
Purpose of the Study:
- * To propose and analyze a novel patterned monolayer graphene metamaterial for tunable terahertz PIT.
- * To investigate the dynamic control of PIT response, terahertz absorption, and slow-light properties.
Main Methods:
- * Theoretical analysis using coupled mode theory (CMT).
- * Numerical simulations to validate theoretical predictions.
- * Investigation of graphene mobility's influence on PIT and absorption.
Main Results:
- * Demonstrated a pronounced PIT phenomenon tunable by voltage due to continuous graphene bands.
- * Achieved high absorption efficiency up to 50%, indicating suitability as a terahertz absorber.
- * Observed a broad band with an ultra-high group refractive index (up to 382), signifying excellent slow-light performance.
Conclusions:
- * The proposed graphene metamaterial offers a versatile platform for tunable terahertz devices.
- * The structure shows significant potential for micro-nano slow-light applications.
- * This work expands design possibilities for advanced terahertz and slow-light technologies.
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