Causal Voigt profile for modeling reflectivity spectra of glasses

A new dielectric function model appropriate for a quantitative analysis of infrared spectra of amorphous solids and glasses is introduced and validated by the study of the infrared reffectivity spectra of two different glasses, a calcium aluminosilicate and a borosilicate. Modeling results show its superiority to the classical sum model and confirm its efficiency in the reproduction of the absorption bands of glasses located in the far infrared range. (C) 2004 Published by Elsevier B.V.