M Foldyna, K Postava, J Bouchala, J Pistora, T Yamaguchi

Proc: Model dielectric function of amorphous materials including Urbach tail

MICROWAVE AND OPTICAL TECHNOLOGY 2003, 9th International Symposim on Microwave and Optical Technology (ISMOT 2003) (2003) pp.301-305

Published by SPIE-INT SOC OPTICAL ENGINEERING, 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA

A generalization of the Tauc-Lorentz model dielectric function of amorphous semiconductors and dielectrics is presented in which the exponential Urbach tail is included. The generalized parametrization of the optical functions includes only six fitting parameters. The real part of the dielectric function is calculated using analytical Kramers-Kronig dispersion relations. The model is applied to hydrogenated amorphous silicon.

Cited articles

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