deletions | additions       diff --git a/Equation_model_quasi_TE_mode__.tex b/Equation_model_quasi_TE_mode__.tex  index def94ec..fd42fd4 100644  --- a/Equation_model_quasi_TE_mode__.tex  +++ b/Equation_model_quasi_TE_mode__.tex 
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Equation model Finally, with the effective index information, a second order polynomial fit can be obtained. As it was mentioned in the course, we can use MATLAB or Lumerical scripting tool to obtain the fit parameters. For the  quasi-TE mode the effective index approximates to:  \begin{center}  $n_{eff} = 2.44763 - 1.12907(\lambda - 1.55) - 0.0354547(\lambda - 1.55)^2$  \end{center}  And for the  quasi-TM mode an approximation of the effective index is:  \begin{center}  $n_{eff} = 1.77031 - 1.24432(\lambda - 1.55) + 1.92466(\lambda - 1.55)^2$  \end{center}