Polarimetry of anisotropic surface layer on glass

Yampolskiy, A. L., Makarenko, O. V. (2020). Polarimetry of anisotropic surface layer on glass. Bulletin of Taras Shevchenko National University of Kyiv. Physics and Mathematics(4), 95–98. https://doi.org/10.17721/1812-5409.2020/4.13

Investigating the Stokes vector of light reflected from the surface of the optical glass, the presence of an anisotropic surface layer was established. The phase difference between radiation p- and s-components is revealed, which varies depending on the angle of incidence. This shows a weak anisotropy. Assuming that the anisotropic layer has an increased refractive index due to its chemical-mechanical treatment, it can be considered as some near-surface weakly guiding gradient burried waveguide. The possibility of coming radiation into such a planar waveguide using a coupling total reflection prism was investigated. The inspection showed a violation of the total internal reflection, unequal for p- and s-polarizations, which confirms the presence of the subsurface layer and its anisotropy. The absorption of radiation, which could be compared with the excitation of modes, is small. This is due to the properties of the prism material. Also, higher order modes are absorbed better. There is no significant angular dependence of the polarization degree of the output beam; however, it is higher in the case of s-polarization.Key words: polarimetry, inhomogeneity, surface layer, glass.Pages of the article in the issue: 95 - 98Language of the article: Ukrainian