Abstract
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.
Original language | English (US) |
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Pages (from-to) | 2251-2256 |
Number of pages | 6 |
Journal | Analytical Chemistry |
Volume | 62 |
Issue number | 20 |
DOIs | |
State | Published - Jan 15 1990 |
Externally published | Yes |
ASJC Scopus subject areas
- Analytical Chemistry