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29 How do I calculate the frequency dependent reflectivity of a material?

The calculation of this quantity is implemented only for isotropic (cubic) solids. It is plotted together with the frequency dependent dielectric constant in insulating cubic solids when q is the $ \Gamma$ point. In this case the code plots also the absorption coefficient. Both quantities can be plotted as a function of the frequency or of the wavelength.



2021-07-20