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Plasmon modes in graphene: status and prospect
Antonio Politano1, Gennaro Chiarello
1Università degli Studi della Calabria, Dipartimento di Fisica, 87036 Rende, CS, Italy. antonio.politano@fis.unical.it.
Nanoscale
|August 19, 2014
Summary
Graphene plasmons exhibit unique properties for applications across various frequencies. This review highlights how substrates, doping, and interactions influence these plasmonic excitations in graphene.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Nanotechnology
Background:
- Graphene plasmons possess unique characteristics, enabling applications from terahertz to visible frequencies.
- Plasmon modes are actively researched in both free-standing and supported graphene configurations.
Purpose of the Study:
- To review plasmons in graphene, focusing on epitaxial graphene and substrate effects.
- To explore methods for tuning plasmon frequencies and recovering pristine graphene properties.
Main Methods:
- Review of experimental results on plasmonic excitations in supported graphene.
- Analysis of tuning mechanisms including chemical doping, gating potentials, and adsorbate interactions.
- Investigation of substrate influence on screening processes and graphene decoupling.
Main Results:
- Substrates significantly influence plasmonic excitations and screening in supported graphene.
- Chemical doping and gating potentials effectively tune graphene plasmon frequencies.
- Adsorbates and intercalation can modify or restore pristine plasmon dispersion.
Conclusions:
- Understanding plasmons in supported graphene is crucial for advancing plasmonic applications.
- Many-body interactions lead to complex phenomena like magnetoplasmons and composite modes.
- Graphene plasmonics offers tunable and versatile platforms for future technologies.
