Spoof Plasmon Surfaces: A Novel Platform for THz Sensing

Binghao Ng*, Jianfeng Wu, Stephen M. Hanham, Antonio I. Fernández-Domínguez, Norbert Klein, Yun Fook Liew, Mark B.H. Breese, Minghui Hong, Stefan A. Maier

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

124 Citations (Scopus)

Abstract

Spoof plasmon surfaces consisting of linear arrays of subwavelength grooves are proposed as a novel platform for THz sensing. The tightly confined spoof plasmons, coupled via an Otto prism setup, are sensitive to the refractive index of the dielectric filling the grooves. Phase jumps at spoof plasmon resonances are used as a readout response for refractive index sensing. An overall sensitivity of 0.49 THz RIU -1 with figures-of-merit as high as 49 are achieved.

Original languageEnglish
Pages (from-to)543-548
Number of pages6
JournalAdvanced Optical Materials
Volume1
Issue number8
DOIs
Publication statusPublished - 1 Aug 2013

Keywords

  • Metamaterials
  • Plasmonics
  • Sensors
  • Subwavelength materials
  • THz

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

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