Terahertz plasmonic waveguide sensing based on metal rod array structures

Borwen You, Chien Chun Peng, Ja Yu Lu, Hungh Hsuan Chen, Jia Shing Jhang, Chin Ping Yu, Tze An Liu, Jin Long Peng, Chi Kuang Sun

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Metallic rod array is successfully demonstrated to be integrated a parallel plate waveguide and used as a slab-waveguide for sensing applications. Both the waveguide properties are characterized from the transmission spectra using different polarization conditions of terahertz electromagnetic fields, which are parallel and perpendicular to the rod axis. When THz field polarization is parallel to the rod axis, there is high-pass filtering feature with structure-period-dependent threshold frequency, corresponding to the plasma frequency of the rod-array composite. For the polarization perpendicular to the rod axis, there is Bragg diffraction frequency as forbidden band with considerably low transmission power. The metal-rod-array integrated parallel-plate waveguide is connected with a microfluidic channel to sense liquids, and the minimum detectable quantity is about 13μmol/mm3. The metal-rod-array slab waveguide is able to sense thinfilm with nanometer level, and the detectable optical path difference is down to λ/2380. The sensor properties of multiple functions for sensing various analyte conformations, microfluidic integration and high sensitivity would be applied in biomedicine and biochemical applications.

Original languageEnglish
Title of host publicationTerahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications VII
PublisherSPIE
ISBN (Print)9780819498984
DOIs
Publication statusPublished - 2014 Jan 1
EventTerahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications VII - San Francisco, CA, United States
Duration: 2014 Feb 42014 Feb 6

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume8985
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Other

OtherTerahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications VII
CountryUnited States
CitySan Francisco, CA
Period14-02-0414-02-06

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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