# Complex Index of Refraction of Silicon and GaAs

| Here is the complex index of referaction of Silicon (from Handbook of Optical Constants of Solids (E.D. Palik))
|  | Note that the imaginary part k increases as soon as the wavelength is small enough for band-to-band absorption processes; i.e. h · n > EG applied (with EG = band gap).
| Here is the dielectric function and the complex index of refraction for GaAs.
|  | Note that several groups actually calculated those curves and that they match rather nicely with the measured values.

With frame

5.2.3 The Complex Index of Refraction

Exercise 5.2.3 Attenuation of Light

Exercise 5.2.5 Rayleigh Scattering

Solution to 5.2-3: Attenuation of Light

© H. Föll (Advanced Materials B, part 1 - script)