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Visible-light Induced Reduction of Graphene Oxide Using Plasmonic Nanoparticle
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Coupling light into graphene plasmons through surface acoustic waves.

Jürgen Schiefele1, Jorge Pedrós2, Fernando Sols3

  • 1Departamento de Física de Materiales, Universidad Complutense de Madrid, E-28040 Madrid, Spain.

Physical Review Letters
|January 31, 2014
PubMed
Summary
This summary is machine-generated.

We demonstrate a new method to couple laser light into graphene plasmons using electrically generated surface acoustic waves. This technique enables efficient coupling and electrical switching, avoiding complex fabrication processes.

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Nanophotonics

Background:

  • Graphene plasmons offer unique light-matter interaction properties.
  • Efficiently coupling light to graphene plasmons is crucial for applications.
  • Existing methods often require complex fabrication or near-field techniques.

Purpose of the Study:

  • To propose a novel scheme for coupling laser light into graphene plasmons.
  • To utilize electrically generated surface acoustic waves for this coupling.
  • To enable electrical switching of the coupling mechanism.

Main Methods:

  • Generating surface acoustic waves on a graphene sheet.
  • Using the surface acoustic wave as a diffraction grating.
  • Exciting the hybridized graphene plasmon-phonon dispersion with infrared laser light.

Main Results:

  • Successfully coupled infrared laser light into graphene plasmons.
  • Demonstrated excitation of the phononlike branch of the plasmon-phonon dispersion.
  • Achieved electrical switching of the coupling between far-field radiation and graphene plasmons.

Conclusions:

  • The proposed scheme offers an efficient and non-patterning method for light coupling to graphene plasmons.
  • Electrically controlled surface acoustic waves provide a versatile tool for manipulating graphene plasmon excitation.
  • This approach simplifies the integration of graphene plasmonics into practical devices.