[1] [1] N. Horiuchi, Nat. Photon. 4, 140 (2010).

[2] [2] B. Ferguson and X.-C. Zhang, Nat. Mater. 1, 26 (2002).

[3] [3] S. Liu and R. Zhong, Journal of University of Electronic Science and Technology of China (in Chinese) 38, 481(2009).

[4] [4] J. Yao, Journal of Chongqing University of Posts and Telecommunications (in Chinese) 22, 703 (2010).

[5] [5] F. Sizov, Opto-Electronics Review 18, 10 (2010).

[6] [6] J. Su, F. Ma, Z. Yu, and W. Wang, Infrared and Laser Engineering (in Chinese) 39, 482(2010).

[7] [7] E. Higurashi, R. Sawada, and T. Ito, Appl. Opt. 38, 1746 (1999).

[8] [8] F. Li, Y. Shi, L. Zhao, and W. Xu, Infrared and Laser Engineering (in Chinese) 40, 1205 (2011).

[9] [9] Q. Zhou and X. Zhang, Chin. Opt. Lett. 9, 110006 (2011).

[10] [10] S. M. Kim, W. Baughman, D. S. Wilbert, L. Butler, M. Bolus, S. Balci, and P. Kung, Chin. Opt. Lett. 9, 110009 (2011).

[11] [11] Q. Zhang, Journal of University of Electronic Science and Technology of China (in Chinese) 37, 1204 (2007).

[12] [12] Z. Guo, Q. Zhang, F. Dong, D. Chen, Z. Xiong, Z. Miao, C. Li, B. Jiao, and X. Wu, Sensors and Actuators A 137, 13 (2007).

[13] [13] J. Hastanin,Y. Renotte, K. Fleury-Frenette, J. M. Defise, and S. Habraken, in Proceedings of Electro-Optical and Infrared Systems on Technology and Applications V 71131C (2008).

[14] [14] Z. Miao, Q. Zhang, D. Chen, Z. Guo, F. Dong, Z. Xiong, X. Wu, C. Li, and B. Jiao, Ultramicroscopy 107, 610 (2007).