optical data for 6H-SiC data are interpolated from those of Choyke and Palik (1985, in Handbook of optical constants of solids, p.587. Orlando:Academic, Ed. E. D. Palik) wavelength microns n k 0.155 1.9900 2.730E+00 0.16 2.3442 2.838E+00 0.165 2.7545 2.856E+00 0.17 3.1270 2.690E+00 0.175 3.4151 2.476E+00 0.18 3.6064 2.261E+00 0.185 3.8282 2.050E+00 0.19 4.0291 1.719E+00 0.195 4.0401 1.329E+00 0.2 3.9600 1.060E+00 0.205 3.8626 8.575E-01 0.21 3.7583 7.024E-01 0.215 3.6568 5.825E-01 0.22 3.5656 4.864E-01 0.225 3.4722 4.155E-01 0.23 3.3835 3.632E-01 0.235 3.3124 3.221E-01 0.24 3.2505 2.990E-01 0.245 3.1919 2.830E-01 0.25 3.1407 2.320E-01 0.255 3.0986 1.439E-01 0.26 3.0628 7.287E-02 0.265 3.0304 5.581E-02 0.27 2.9984 4.489E-02 0.275 2.9637 3.795E-02 0.28 2.9244 3.199E-02 0.285 2.8839 2.720E-02 0.29 2.8475 2.221E-02 0.295 2.8206 1.729E-02 0.3 2.8085 1.322E-02 0.305 2.8166 1.074E-02 0.31 2.8500 9.480E-03 0.315 2.9029 8.328E-03 0.32 2.9254 7.177E-03 0.325 2.9054 6.190E-03 0.33 2.8867 5.497E-03 0.335 2.8772 4.942E-03 0.34 2.8664 4.300E-03 0.345 2.8546 3.684E-03 0.35 2.8441 3.223E-03 0.355 2.8345 2.826E-03 0.36 2.8253 2.412E-03 0.365 2.8165 2.018E-03 0.37 2.8082 1.686E-03 0.375 2.8001 1.414E-03 0.38 2.7922 1.185E-03 0.385 2.7846 9.622E-04 0.39 2.7776 7.029E-04 0.395 2.7711 4.218E-04 0.4 2.7650 1.910E-04 0.405 2.7592 8.240E-05 0.41 2.7536 5.579E-05 0.415 2.7482 3.973E-05 0.42 2.7432 3.137E-05 0.425 2.7386 2.498E-05 0.43 2.7343 2.144E-05 0.435 2.7305 1.870E-05