Effective Medium-Based Plasmonic Waveguides for Tailoring Dispersion

M. Balasubrahmaniyam, T. Abhilash, A. R. Ganesan, S. Kasiviswanathan

Research output: Contribution to journalArticlepeer-review


We propose a waveguide configuration with a plasmonic grating for tailoring dispersion characteristics. The unit-cell of the plasmonic grating encompasses the subwavelength distribution of metal nanowires forming a highly resonant effective medium. The configuration enables independent control of the coupling between the plasmonic and waveguide modes via the resonant strength of the effective medium. Numerical simulations show that the line shapes of the coupled modes can be varied from Fano to electromagnetically induced transparency-like. Furthermore, we use the structure to enhance the group index from 250 to 850 and to broaden the associated band from 40 to 180 meV.

Original languageEnglish
Article number7130583
Pages (from-to)1965-1968
Number of pages4
JournalIEEE Photonics Technology Letters
Issue number18
StatePublished - 15 Sep 2015
Externally publishedYes


  • Dispersion
  • Electromagnetic metamaterials
  • Photonic crystals
  • Plasmons
  • Slow light


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