1. 1) P. Y. Yu and M. Cardona, “Fundamentals of Semiconductors: Physics and Materials Properties”, 3rd ed., Springer, Berlin (2005).
2. 2) J. S. McCloy, R. Korenstein and B. Zelinski, J. Am. Ceram. Soc., 92, 1725–1731 (2009).
3. 3) L. G. Fu, C. S. Huo, F. C. Zhang, N. G. Wei, X. W. Wang and F. X. Lv, Infrared Laser Eng., 41, 139–143 (2012).
4. 4) D. C. Harris, Proc. SPIE, 6545, 654502 (2007).
5. 5) P. Ramavath, N. Ravi, U. S. Hareesh, R. Johnson and N. E. Prasad, T. Indian I. Metals, 63, 847–852 (2010).