Interferometric refractive index sensing with Terahertz spoof surface plasmons

Steven Andrews, Yi Pan, P G Huggard, Siti Norbaieah Mohamad Hashim

Research output: Contribution to journalArticlepeer-review


Near field interference of spoof surface plasmons propagating on two opposing faces of a thin metal sheet waveguide perforated by a periodic array of tapered holes has been investigated by time-domain terahertz spectroscopy. Closely spaced, chirped spectral interference fringes are observed in the output near the field as a result of the different nonlinear dispersion of the two surface modes. Results illustrating the potential of such a structure for interferometric refractive index sensing of nanolitres of analytes are presented.

Original languageEnglish
Pages (from-to)516-523
Number of pages8
JournalInternational Journal of Infrared and Millimeter Waves
Issue number5
Early online date13 Apr 2019
Publication statusPublished - 15 May 2019


  • Interferometry
  • Metamaterials
  • Refractive index
  • Sensing
  • Terahertz

ASJC Scopus subject areas

  • Radiation
  • Instrumentation
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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