Integrated optical attenuated total reflection spectrometry of aqueous superstrates using prism-coupled polymer waveguides.

Attenuated total reflection (ATR) spectrometry of aqueous solutions in contact with polystyrene integrated optical waveguides has been investigated. The mode-dependent absorption of evanescent energy by fluorescein solutions adjacent to the waveguide surface was measured and compared to theoretical predictions based on a ray optics approach. Although enhanced sensitivity was observed with increasing mode number, the sensitivity for the highest order mode was less than that predicted by theory.

Duke Scholars

Author William M. Reichert Biomedical Engineering