[1] Akyildiz I F, Jornet J M, Han C. Physical Communication, 2014, 12: 16.

[2] Bohunicky B, Mousa S A. Nanotechnology, Science and Applications, 2011, 4: 1.

[3] Ayech M, Ziou D. Proceedings of the IEEE Conference on Computer Vision and Pattern Recognition Workshops, 2015. 35.

[4] Xiao R, Rong Z, Pang Y F, et al. Optics Communications, 2015, 336: 116.

[5] Zhu J, Han J G, Tian Z, et al. Optics Communications, 2011, 284(12): 3129.

[6] Zheng W, Li W, Chang S J. Optoelectronics Letters, 2015, 11: 18.

[7] Liu H Q, Ren G B, Gao Y X, et al. Plasmonics, 2015. 1.

[8] Wen Q Y, Zhang H W, Xie Y S, et al. Applied Physics Letters, 2009, 95(24): 241111.

[9] Tao H, Bingham C M, Pilon D, et al. Journal of physics D: Applied Physics, 2010, 43(22): 225102.

[11] Arezoomand A S, Zarrabi F B, Heydari S, et al. Optics Communications, 2015, 352: 121.

[12] Singh R, Azad A K, Jia Q X, et al. Optics Letters, 2011, 36(7): 1230.

[13] Padilla W J, Taylor A J, Highstrete C, et al. Physical Review Letters, 2006, 96(10): 107401.

[14] Schurig D, Mock J J, Smith D R. Applied Physics Letters, 2006, 88(4): 041109.

[15] Han J G, Zhang W L, Chen W, et al. The Journal of Physical Chemistry C, 2007, 111(35): 13000.

[16] Jeppesen C, Mortensen N A, Kristensen A. Applied Physics Letters, 2009, 95(19): 193108.

[17] Garland J C, Tanner D B. American Institute of Physics, New York, 1978.

[18] Howells S C, Schlie L A. Applied Physics Letters, 1996, 69(4): 550.

[19] Van E M, Grischkowsky D. Physical Review B, 1990, 41(17): 12140.

[20] Manzanares M J, Ramos M F, Halevi P. Applied Physics Letters, 2005, 87(10): 101110.

[22] Chettiar U K, Kildishev A V, Yuan H K, et al. Optics Letters, 2007, 32(12): 1671.