Monitoring adsorption and sedimentation using evanescent-wave cavity ringdown ellipsometry

Katerina Stamataki, Vassilis Papadakis, Michael A. Everest, Stelios Tzortzakis, Benoit Loppinet, T. Peter Rakitzis

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Abstract

We monitor the adsorptionofRhodamine 800, and the sedimentation of a polytetrafluoroethylene (PTFE) suspension at the surface of a fused-silica prism, by measuring both the absorption and s-p phase shift Δ of a 740 nm probe laser beam, using evanescent-wave cavity ringdown ellipsometry (EW-CRDE). The two systems demonstrate the complementary strengths of EW-CRDE, as the progress of adsorption of the Rhodamine 800 dye can only be observed sensitively via the measurement of absorption, whereas the progress of sedimentation of PTFE can only be observed sensitively via the measurement of Δ. We show that EW-CRDE provides a sensitive method for the measurement of Δ and demonstrates precision in Δ of about 10-4 deg.

Original languageEnglish
Pages (from-to)1086-1093
Number of pages8
JournalApplied Optics
Volume52
Issue number5
DOIs
Publication statusPublished - 10 Feb 2013

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ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering

Cite this

Stamataki, K., Papadakis, V., Everest, M. A., Tzortzakis, S., Loppinet, B., & Rakitzis, T. P. (2013). Monitoring adsorption and sedimentation using evanescent-wave cavity ringdown ellipsometry. Applied Optics, 52(5), 1086-1093. https://doi.org/10.1364/AO.52.001086