[1] [1] Hatab N A, Hsueh C H, Gaddis A L, et al. Nano Letters, 2010, 10(12): 4952.

[2] [2] Wang D, Yu X, Yu Q. Nanotechnology, 2012, 23(40): 405201.

[3] [3] Im H, Bantz K C, Lee S H, et al. Advanced Materials, 2013, 25(19): 2678.

[4] [4] Li J F, Huang Y F, Ding Y, et al. Nature, 2010, 464(7287): 392.

[5] [5] Clayton D A, McPherson T E, Pan S, et al. Physical Chemistry Chemical Physics, 2013, 15(3): 850.

[6] [6] Hugall J T, Baumberg J J, Mahajan S. Applied Physics Letters, 2009, 95(14): 141111.

[7] [7] Kawata S, Inouye Y, Verma P. Nature Photonics, 2009, 3(7): 388.

[8] [8] Su Y H, Ke Y F, Cai S L, et al. Light: Science & Applications, 2012, 1(6): e14.

[9] [9] Mayer K M, Hafner J H. Chemical Reviews, 2011, 111(6): 3828.

[11] [11] Gramotnev D K, Bozhevolnyi S I. Nature Photonics, 2010, 4(2): 83.

[12] [12] Amendola V, Bakr O M, Stellacci F. Plasmonics, 2010, 5(1): 85.

[13] [13] Du L, Zhang X, Mei T, et al. Optics Express, 2010, 18(3): 1959.

[14] [14] Wustholz K L, Henry A I, McMahon J M, et al. Journal of the American Chemical Society, 2010, 132(31): 10903.

[15] [15] Johnson P B, Christy R W. Physical Review B, 1972, 6(12): 4370.

[16] [16] Hao E, Schatz G C. The Journal of Chemical Physics, 2003, 120(1): 357.

[17] [17] Raether H. Surface Plasmons on Smooth and Rough Surfaces and on Gratings. Springer Berlin Heidelberg, 1988.

[18] [18] Scholes F H, Davis T J, Vernon K C, et al. Journal of Raman Spectroscopy, 2012, 43(2): 196.

[19] [19] Novotny L. Physical Review Letters, 2007, 98(26): 266802.

[20] [20] Jain P K, Huang W, El-Sayed M A. Nano Letters, 2007, 7(7): 2080.

[21] [21] Kelly K L, Coronado E, Zhao L L, et al. The Journal of Physical Chemistry B, 2003, 107(3): 668.

[22] [22] Chen H, Kou X, Yang Z, et al. Langmuir, 2008, 24(10): 5233.