Dielectric-experimental parameters Frequency limits

By using suitable extrapolations [3] of the experimental data, beyond the upper and lower frequency limits of the measurements, and carrying out a Kramers-Kronig analysis, it is possible to obtain the dispersion of the real parts of the dielectric function and of the conductivity. The latter function is particularly suited for a comparison with the results of theoretical models, and for the determination of physical parameters by model fittings. 

---