30 July 1997 Characterization of polymeric films by integrated optics
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Abstract
Integrated optics are powerful and versatile methods for determining the structural properties of polymeric thin films. By complete analyses of the modal structure of the optical fields within the guiding film, the thickness, indices of refraction (including any anisotropy) and the attenuation of the propagating wave can all be calculated. The decrease in the optical field with distance can be caused by absorption or Rayleigh scattering, that is, surface and bulk scattering. Because each mode has a distinct profile across a film, laminar structures through a film or a multilayered film are probed. The intense optical field within the waveguide makes possible fluorescence or Raman scattering with good signal strength. To reduce interference coming from fluorescence, frequently found in commercial polymers, Fourier transform waveguide Raman in the infrared allows one to observe the Raman spectrum without exciting any fluorescence. Finally, the high sensitivity of optical waveguides to structural or chemical changes has led to a number of sensor and nonlinear optical applications.
© (1997) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jerome D. Swalen, Jerome D. Swalen, } "Characterization of polymeric films by integrated optics", Proc. SPIE 10291, Materials Characterization and Optical Probe Techniques: A Critical Review, 102910O (30 July 1997); doi: 10.1117/12.279851; https://doi.org/10.1117/12.279851
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