Waveguide Zeeman interferometry for thin-film chemical sensors

K. M. Grace, K. Shrouf, S. Honkanen, P. Äyräs, P. Katila, M. Leppihalme, R. G. Johnston, X. Yang, B. Swanson, N. Peyghambarian

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


The authors demonstrate a highly sensitive chemical sensor scheme based on Si3N4 channel waveguides, species-selective surface coatings and Zeeman interferometry. The relative phase change between the TE and TM modes under exposure to toluene vapour is measured. The measurements demonstrate the real-time and reversible response with good sensitivity at low concentrations.

Original languageEnglish (US)
Pages (from-to)1651-1653
Number of pages3
JournalElectronics Letters
Issue number19
StatePublished - Sep 11 1997


  • Chemical sensors
  • Light interferometry
  • Optical waveguides

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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