Plasmonic Grating Based on Insulator-Metal-Insulator Structure at Telecom Wavelengths

  • Bobo Du
  • , Yuan Yang
  • , Yang Zhang
  • , Dexing Yang

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

A telecom-wavelength plasmonic grating based on an insulator-metal-insulator (IMI) structure is investigated numerically. The effective refractive index of the IMI structure is obtained. Furthermore, Bragg grating and phase-shifted Bragg grating are formed by introducing periodic thickness variation and a defect, respectively, in the width of the metal layer. The spectra can be easily tuned through changing the geometrical parameters. A high-Q factor of 890 is obtained in the plasmonic phase-shifted grating thanks to low loss and dispersion of the IMI structure. This letter develops the surface plasmon polaritons technology in metallic waveguide structures, and will lead to more optoelectronic applications.

Original languageEnglish
Article number8444735
Pages (from-to)1691-1694
Number of pages4
JournalIEEE Photonics Technology Letters
Volume30
Issue number19
DOIs
StatePublished - 1 Oct 2018
Externally publishedYes

Keywords

  • Surface plasmon polaritons
  • insulator-metal-insulator
  • plasmonic grating
  • telcom wavelengths

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