Random walk

By closing a paper based on dielectric permittivities of metals, I realized how much these optical data are badly known. Despite of the extraordinary efforts of Palik and co-workers to collect all together a large amount of good optical data, it appears...

The problem At the interface with a slab material, a monochromatic wave experiments a reflection and a refraction as well described by the well-known Snell-Descartes law as follows for air environment \[ \sin \theta_i = n \sin \theta_r, \] where $\theta_i...

If you want to calculate dielectric constants from experimental measurements of transmission or reflection, you can use this great software. RefFit First step is to fit the spectrum with Drude-Lorentz model and then fill the Kramer-Kronig requirements....