Thickness and model optimization in characterization of optical interference films by using discontinuities of n(lambda) solutions

M. Montecchi, E. Masetti, G. Emiliani

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21 Citations (Scopus)


The characterization of inhomogeneous thin film has been a widely studied topic. In the present work an inhomogeneous film model where the real part of the refractive index has a parabolic profile through the film thickness is supposed and a procedure for the unequivocal determination of the model parameters from normal incidence spectro-photometric measurements of T(lambda), R(lambda) and R'(lambda) is outlined. The parabolic model can be useful in the initial stage of investigation on a film material, which is suspected of being inhomogenous, as the model parameters, the gradient and curvature of the n parabolic profile, provide a quantitative evaluation of the film inhomogeneity even when the parabolic model is not realistic.
Original languageEnglish
Article number003
Pages (from-to)15 - 26
Number of pages12
JournalPure and Applied Optics: Journal of the European Optical Society Part A
Issue number1
Publication statusPublished - 1995


All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

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