[1] D. M. Costantini, C. A. P. Muller, S. A. Vasiliev, H. G. Limberger, and R. P. Salathe, IEEE Photon. Technol. Lett. 11, 1458 (1999).
[2] E. Wu, R.-C. Yan, K.-C. San, C.-H. Lin, F. Alhassen, and H. P. Lee, IEEE Photon. Technol. Lett. 17, 612 (2005).
[3] O. Duhem, A. Dascota, and J. F. Henninot, Electron. Lett. 35, 1014 (1999).
[4] A. Iadicicco, S. Campopiano, D. Paladino, A. Cutolo, A. Cusano, and W. Bock, LNEE Sens. Microsyst. 54, 133 (2010).
[5] J. Zhang, X. Qiao, M. Hu, Z. Feng, H. Gao, Y. Yang, and R. Zhou, Chin. Opt. Lett. 9, 090606 (2011).
[6] T. Erdogan, J. Opt. Soc. Am. A 14, 1760 (1997).
[7] W. He, J. Li, and J. Mei, J. Inorg. Mater. (in Chinese) 20, 210 (2005).
[8] Y. Q. Li and M. Cui, Optical Waveguide Theory and Technology (in Chinese) (Posts & Telecommunications Press, Beijing, 2000).
[9] D. P. Edward, Handbook of Optical Constants of Solids (Academic Press, New York, 1985).
[10] Z. Zhang, W. Shi, K. Gao, and Z. Fang, Opt. Technique (in Chinese) 30, 525 (2004).
[11] T. Jia, T. He, P. Li, Y. Mo, and Y. Cui, Opt. Laser Technol. 40, 936 (2008).
[12] A. K. Sharma and B. D. Gupta, Opt. Fiber Technol. 12, 87 (2006).