A Review on Thin-film Sensing with Terahertz Waves

  • John F. O’Hara
  • Withawat Withayachumnankul
  • Ibraheem Al-Naib
Invited Review Article

DOI: 10.1007/s10762-012-9878-x

Cite this article as:
O’Hara, J.F., Withayachumnankul, W. & Al-Naib, I. J Infrared Milli Terahz Waves (2012) 33: 245. doi:10.1007/s10762-012-9878-x

Abstract

In the past two decades, the development and steady improvement of terahertz technology has motivated a wide range of scientific studies designed to discover and develop terahertz applications. Terahertz sensing is one such application, and its continued maturation is virtually guaranteed by the unique properties that materials exhibit in the terahertz frequency range. Thin-film sensing is one branch of this effort that has enjoyed diverse development in the last decade. Deeply subwavelength sample thicknesses impose great difficulties to conventional terahertz spectroscopy, yet sensing those samples is essential for a large number of applications. In this article we review terahertz thin-film sensing, summarizing the motivation, challenges, and state-of-the-art approaches based predominately on terahertz time-domain spectroscopy.

Keywords

TerahertzTHzThin-filmSensingTime-domain spectroscopyTerahertz interferometryTerahertz differential time-domain spectroscopyTerahertz goniometryTerahertz ellipsometryParallel plate waveguideMicrostrip transmission lineFilterMetamaterialMetasurfaceSplit-ringResonatorFrequency selective surfaceSurface waveZenneck waveSurface plasmon polaritonHole arraySensitivityQuality factor

Copyright information

© Springer Science+Business Media, LLC 2012

Authors and Affiliations

  • John F. O’Hara
    • 1
  • Withawat Withayachumnankul
    • 2
    • 3
  • Ibraheem Al-Naib
    • 4
  1. 1.Electrical & Computer EngineeringOklahoma State UniversityStillwaterUSA
  2. 2.School of Electrical & Electronic EngineeringThe University of AdelaideAdelaideAustralia
  3. 3.Faculty of EngineeringKing Mongkut’s Institute of Technology LadkrabangBangkokThailand
  4. 4.INRS-EMTQuébecCanada