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Polynomial fitting approach for the Kramers–Kronig method for optical properties computing for Bi2O3 fabric

Domenii publicaţii > Fizica + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: G. Murariu, S. Condurache-Bota, N. Țigãu

Editorial: International Journal of Modern Physics B , 26(7), p.1250049 -1, 2012.


The optical reflectance of Bi2O3 was measured, and the optical properties were estimated by Kramers–Kronig analysis. The novelty of the present study is due to the implementation
of a MAPLE software approach to the complex computations implied by this
extrapolation. The analytical fit of the reflectance spectrum is applied, accompanied by a careful extrapolation, which is necessary within the Kramers–Kronig method. In this way starting from the reflectance samples data, using this transformation, a very good agreement is obtained between the main optical parameters, namely the refractive index
and the absorption coefficient. The study is implemented for Bi2O3 films deposited by thermal vacuum evaporation at different temperatures of the glass substrates and the comparison with the experimental data set being made using the transmission and the reflection optical spectra.

Cuvinte cheie: Numerical approaching; Kramers–Kronig analysis; Bi2O3 films; computational physics.