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Square hollow nanostructure can induce a large-area enhanced electric field at the main plasmon peak. Therefore, it can be used as a substrate for the surface enhanced Raman scattering. The effects of the incident polarization on the extinction spectrum and the electric field distribution of the square Ag nanostructure are studied by the discrete dipole approximation method. The results show that the plasmon peaks do not shift with the variation of incident polarization. However, the electric field distribution is strongly dependent on the direction of incident polarization. Additionally, the effect of the electric field coupling between adjacent square Ag nanostructures on the plasmon mode is also studied. It is found that the plasmon resonance can be tuned by varying the separation between adjacent squares. These results could be used to guide the preparation of such closed nanostructures for specific plasmonic applications.
[1] Hao P, Wu Y H, Zhang P 2010 Acta Phys. Sin. 59 6532 (in Chinese) [郝 鹏、吴一辉、张 平 2010 59 6532 ]
[2] [3] Wang K, Yang G, Long H, Li Y H, Dai N L, Lu P Y 2008 Acta Phys. Sin. 57 3862 (in Chinese) [王 凯、杨 光、龙 华、李玉华、戴能利、陆培祥 2008 57 3862]
[4] Wu D J, Liu X J 2008 Acta Phys. Sin. 57 5138 (in Chinese) [吴大建、 刘晓峻 2008 57 5138]
[5] [6] [7] Moskovits M 1985 Rev. Mod. Phys. 57 783
[8] [9] Campion A, Kambhampati P 1998 Chem. Soc. Rev. 27 241
[10] Tian Z Q, Ren B, Wu D Y 2002 J. Phys. Chem. B 106 9463
[11] [12] Vo-Dinh T 1998 Trac. Trends Anal. Chem. 17 557
[13] [14] Liu M M, Zhang G P, Zou M 2006 Acta Phys. Sin. 55 4608 (in Chinese) [刘敏敏、张国平、邹 明 2006 55 4608]
[15] [16] Nie S M, Emory S R 1997 Science 275 1102
[17] [18] Kelly K L, Coronado E, Zhao L L, Schatz G C 2003 J. Phys. Chem. B 107 668
[19] [20] Zhang Z Y, Zhao Y P 2006 Appl. Phys. Lett. 89 023110
[21] [22] [23] Huang Q, Wang J, Cao L R, Sun J, Zhang X D, Geng W D, Xiong S Z, Zhao Y 2009 Acta Phys. Sin. 58 1980 (in Chinese)[黄 茜、王 京、 曹丽冉、孙 建、张晓丹、耿卫东、熊绍珍、赵 颖 2009 58 1980]
[24] [25] Zhu B H, Wang F F, Zhang K, Ma G H, Gou L J, Qian S X 2007 Acta Phys. Sin. 56 4024 (in Chinese)[朱宝华、王芳芳、张 琨、马国宏、郭立俊、钱士雄 2007 56 4024]
[26] Zhang Z Y, Xiong Z H 2010 Sci. China G 40 330 (in Chinese) [张中月、熊祖洪 2010 中国科学G 40 330]
[27] [28] [29] Zhang Z Y, Liu Y J, Zhao Q, Zhao Y P 2009 Appl. Phys. Lett. 94 143107
[30] Hao F, Nehl C L, Hafner J H, Nordlander P 2007 Nano Lett. 7 729
[31] [32] [33] Liu Y J, Zhang Z Y, Zhao Y P 2008 Appl. Phys. Lett. 93 173106
[34] [35] Su K H, Wei Q H, Zhang X, Mock J J, Smith D R, Schultz S 2003 Nano Lett. 3 1087
[36] Zhao L L, Kelly K L, Schatz G C 2003 J. Phys. Chem. B 107 7343
[37] [38] [39] Flatau P J, Stephens G L, Draine B T 1990 J. Opt. Soc. Am. A 7 593
[40] Lei C X, Wu Z S 2010 Acta Phys. Sin. 59 5692 (in Chinese) [类成新、吴振森 2010 59 5692]
[41] [42] Jensen T, Kelly L, Lazarides A, Schatz G C 1999 J. Cluster Sci. 10 295
[43] [44] [45] Johnson P B, Christy R W 1972 Phys. Rev. B 6 4370
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[1] Hao P, Wu Y H, Zhang P 2010 Acta Phys. Sin. 59 6532 (in Chinese) [郝 鹏、吴一辉、张 平 2010 59 6532 ]
[2] [3] Wang K, Yang G, Long H, Li Y H, Dai N L, Lu P Y 2008 Acta Phys. Sin. 57 3862 (in Chinese) [王 凯、杨 光、龙 华、李玉华、戴能利、陆培祥 2008 57 3862]
[4] Wu D J, Liu X J 2008 Acta Phys. Sin. 57 5138 (in Chinese) [吴大建、 刘晓峻 2008 57 5138]
[5] [6] [7] Moskovits M 1985 Rev. Mod. Phys. 57 783
[8] [9] Campion A, Kambhampati P 1998 Chem. Soc. Rev. 27 241
[10] Tian Z Q, Ren B, Wu D Y 2002 J. Phys. Chem. B 106 9463
[11] [12] Vo-Dinh T 1998 Trac. Trends Anal. Chem. 17 557
[13] [14] Liu M M, Zhang G P, Zou M 2006 Acta Phys. Sin. 55 4608 (in Chinese) [刘敏敏、张国平、邹 明 2006 55 4608]
[15] [16] Nie S M, Emory S R 1997 Science 275 1102
[17] [18] Kelly K L, Coronado E, Zhao L L, Schatz G C 2003 J. Phys. Chem. B 107 668
[19] [20] Zhang Z Y, Zhao Y P 2006 Appl. Phys. Lett. 89 023110
[21] [22] [23] Huang Q, Wang J, Cao L R, Sun J, Zhang X D, Geng W D, Xiong S Z, Zhao Y 2009 Acta Phys. Sin. 58 1980 (in Chinese)[黄 茜、王 京、 曹丽冉、孙 建、张晓丹、耿卫东、熊绍珍、赵 颖 2009 58 1980]
[24] [25] Zhu B H, Wang F F, Zhang K, Ma G H, Gou L J, Qian S X 2007 Acta Phys. Sin. 56 4024 (in Chinese)[朱宝华、王芳芳、张 琨、马国宏、郭立俊、钱士雄 2007 56 4024]
[26] Zhang Z Y, Xiong Z H 2010 Sci. China G 40 330 (in Chinese) [张中月、熊祖洪 2010 中国科学G 40 330]
[27] [28] [29] Zhang Z Y, Liu Y J, Zhao Q, Zhao Y P 2009 Appl. Phys. Lett. 94 143107
[30] Hao F, Nehl C L, Hafner J H, Nordlander P 2007 Nano Lett. 7 729
[31] [32] [33] Liu Y J, Zhang Z Y, Zhao Y P 2008 Appl. Phys. Lett. 93 173106
[34] [35] Su K H, Wei Q H, Zhang X, Mock J J, Smith D R, Schultz S 2003 Nano Lett. 3 1087
[36] Zhao L L, Kelly K L, Schatz G C 2003 J. Phys. Chem. B 107 7343
[37] [38] [39] Flatau P J, Stephens G L, Draine B T 1990 J. Opt. Soc. Am. A 7 593
[40] Lei C X, Wu Z S 2010 Acta Phys. Sin. 59 5692 (in Chinese) [类成新、吴振森 2010 59 5692]
[41] [42] Jensen T, Kelly L, Lazarides A, Schatz G C 1999 J. Cluster Sci. 10 295
[43] [44] [45] Johnson P B, Christy R W 1972 Phys. Rev. B 6 4370
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