Applied Physics B

, Volume 98, Issue 2–3, pp 353–363 | Cite as

Interplay of plasmon resonances in binary nanostructures

Article

Abstract

By introducing the difference permittivity ratio η=(ε2ε0)/(ε1ε0), the Green matrix method for computing surface plasmon resonances is extended to binary nanostructures. Based on the near field coupling, the interplay of plasmon resonances in two closely packed nanostrips is investigated. At a fixed wavelength, with varying η the resonances exhibit different regions: the dielectric effect region, resonance chaos region, collective resonance region, resonance flat region, and newbranches region. Simultaneously, avoiding crossing and mode transfer phenomena between the resonance branches are observed. These findings will be helpful to design hybrid plasmonic subwavelength structures.

PACS

73.20.Mf 78.67.-n 78.68.+m 

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Copyright information

© Springer-Verlag 2009

Authors and Affiliations

  • Y. Gu
    • 1
  • Y. Wang
    • 1
  • J. Li
    • 1
  • O. J. F. Martin
    • 2
  • Q. Gong
    • 1
  1. 1.State Key Laboratory for Mesoscopic Physics, Department of PhysicsPeking UniversityBeijingChina
  2. 2.Nanophotonics and Metrology Laboratory, Swiss Federal Institute of Technology Lausanne (EPFL), EPFL-STI-NAMLausanneSwitzerland

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