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Graphene-protected copper and silver plasmonics.

V G Kravets1, R Jalil1, Y-J Kim2

  • 1School of Physics and Astronomy, University of Manchester, Manchester, M13 9PL, UK.

Scientific Reports
|July 2, 2014
PubMed
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Graphene-protected copper and silver exhibit excellent plasmonic properties, overcoming stability and cost limitations. This breakthrough enables durable, high-performance plasmonic devices for various applications.

Area of Science:

  • Physics
  • Materials Science
  • Nanotechnology

Background:

  • Plasmonics offers revolutionary potential in data processing, photovoltaics, and bio-detection.
  • Widespread plasmonic device adoption is limited by high optical losses and unstable, costly metal films.
  • There is a need for plasmonic materials compatible with complementary metal-oxide-semiconductor (CMOS) technology.

Purpose of the Study:

  • To investigate copper and silver, protected by graphene, as viable plasmonic materials.
  • To assess the stability and plasmonic performance of graphene-protected metal films.
  • To demonstrate the practical application of these materials in plasmonic devices.

Main Methods:

  • Fabrication of copper films coated with one to a few layers of graphene.

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  • Evaluation of plasmonic characteristics of the protected films.
  • Testing the stability of graphene-protected copper in corrosive environments.
  • Demonstration of dielectric loaded plasmonic waveguides and surface plasmon resonance sensitivity.

    • Main Results:

    • Graphene-protected copper films exhibit excellent plasmonic characteristics.
    • The protected films demonstrate stability for at least one year, even in wet and corrosive conditions.
    • Proof-of-concept plasmonic waveguides and sensitive surface plasmon resonance detection were achieved.

    Conclusions:

    • Graphene-protected copper and silver are promising, stable, and cost-effective plasmonic materials.
    • These materials overcome key limitations hindering the widespread use of plasmonic devices.
    • The findings are expected to drive the adoption of graphene-protected plasmonics in various technological fields.