The Classical Treatment of Free and Bound Charge Carriers
摘要
The Drude theory as well as the Lorentzian oscillator model allow describing important features of optical material properties of metals and dielectrics in the language of classical physics. Refraction and absorption appear to be described as interconnected optical phenomena. In transparency regions, media exhibit normal dispersion, while anomalous dispersion is observed in spectral regions where strong absorption appears. Effects of the material density on the optical properties of insulators may be tackled in terms of the Lorentz–Lorenz-Equation.