Polarimetry of inhomogeneous films of anisotropic crystallites: birefringence in BaTiO_3 thin films
| Autor: | D. L. Kaiser, L. D. Rotter |
|---|---|
| Rok vydání: | 1995 |
| Předmět: |
Birefringence
Materials science business.industry Isotropy Polarimeter Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Amorphous solid Condensed Matter::Materials Science Tetragonal crystal system Optics Condensed Matter::Superconductivity Computer Vision and Pattern Recognition Crystallite Thin film business Anisotropy |
| Zdroj: | Journal of the Optical Society of America A. 12:999 |
| ISSN: | 1520-8532 1084-7529 |
| DOI: | 10.1364/josaa.12.000999 |
| Popis: | We describe a polarimetric investigation of an inhomogeneous film of anisotropic crystallites, for which the crystallite size cannot be resolved by the polarimeter. We present a model of the film as a collection of stacks of randomly selected linear wave plates and present a simulation of the polarimeter output with the model film as the specimen. We analyze the simulation results in terms of a stopped random walk on the Poincare sphere. The simulation results are sensitive to the spatial resolution of the polarimeter, crystallite size, film thickness, and the presence of isotropic phases. When all but one variable can be determined independently, the model can be used to estimate the remaining variable. The results reproduce linear-birefringence-type measurements on polycrystalline BaTiO3 thin films. The relative amount of isotropic (cubic and amorphous) to tetragonal phase in two BaTiO3 films is estimated. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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