Modeling the optical constants of 6H-SiC in the energy region 1-30 eV

Optical properties of 6H-SiC in the range from 1 eV to 30 eV far the compon ent perpendicular to the c axis are modeled using the modified Adachi model . Model parameters are determined by acceptance-probability-controlled simu lated annealing. The main distinguishing feature of the model employed here is the use of variable broadening instead of the conventional Lorentzian o ne. The type of broadening is determined by the ratio of two adjustable mod el parameters, so that greater flexibility of the model is achieved. In suc h a way, excellent agreement with experimental data is obtained, giving rel ative rms error of 3.5% for the real part of the index of refraction and 5. 2% for the imaginary part. (C) 1998 Elsevier Science B.V. All rights reserv ed.