[1] H. Tao, W. J. Padilla, X. Zhang, and R. D. Averitt, IEEE J. Sel. Top. Quantum Electron. 17, 92 (2011).
[2] Q. Du, J. Liu, and H. Yang, Chin. Opt. Lett. 9, 110015 (2011).
[4] L. B. Wolff, J. Opt. Soc. Am. A 11, 2956 (1994).
[5] C. C. Homes, G. L. Carr, R. P. S. M. Lobo, J. D. La Veigne, and D. B. Tanner, Appl. Opt. 46, 7884 (2007).
[6] R. W. McMillan, C. W. Trussell, R. A. Bohlander, J. C. Butterworth, and R. E. Forsythe, IEEE Trans. Microwave Theory Technol. 39, 555 (1991).
[7] T. Tamulevicius, I. Grazuleviciute, A. Jurkeviciute, and S. Tamulevicius, Opt. Lasers in Eng. 51, 1185 (2013).
[8] H. K. Khanfar and R. M. A. Azzam, Appl. Opt. 48, 5121 (2009).
[9] J. Man and Y. Fan, Opt. Laser Technol. 44, 608 (2012).
[10] W. A. Challener, P. L. Richards, and S. C. Zillio, Infrared Phys. 20, 215 (1980).
[11] A. E. Costley, K. H. Hursey, G. F. Neill, and J. M. Ward, J. Opt. Soc. Am. 67, 979 (1977).
[12] Y. Ma, A. Khalid, T. D. Drysdale, and D. R. S. Cumming, Opt. Lett. 34, 1555 (2009).
[13] C. W. Berry and M. Jarrahi, J. Infrared Milli Terahz Waves 33, 127 (2012).
[14] I. Yamada, K. Takano, M. Hangyo, M. Saito, and W. Watanabe, Opt. Lett. 34, 274 (2009).
[15] M. Born and E. Wolf, Principle of Optics (Pergamon Press, New York, 1975).
[16] W. Wang, J. Liu, X. Li, H. Han, and Z. Hong, Acta Opt. Sin. 32, 1231002 (2012).
[17] R. Zhao, J. He, J. Li, C. Guo, Y. Du, and Z. Hong, Acta Phys. Chem. Sin. 27, 2743 (2011).
