1. On loan from Raytheon TI systems, Dallas, TX.
2. Manufactured by Ted Pella, Inc, Redding, CA.
3. B. Jensen and A. Torabi, J. Appl. Phys. 54, 5945 (1983).
4. R.M. Azzam and N.M. Bashara, Ellipsometry and polarized light, (Amsterdam: North-Holland, 1977).
5. E. Palik, Handbook of Optical Constants of Solids II, (Orlando, FL: Academic Press, 1985).