Line shape of the optical dielectric function

Garland, J. W.; Abad, H.; Viccaro, M.; Raccah, P. M.
April 1988
Applied Physics Letters;4/4/1988, Vol. 52 Issue 14, p1176
Academic Journal
A systematic study of the optical dielectric function by spectroscopic ellipsometry and electroreflectance has shown that the proper functional form for the Green’s function for an electron-hole pair in GaAs or CdTe is primarily Gaussian, not Lorentzian as is commonly assumed, although it is primarily Lorentzian for Hg1-xCdxTe. The Lorentzian part of the broadening is shown to measure the alloy, impurity, and defect scattering.


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