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The extinction spectra and the electric field distributions of the cross-shaped nanostructures are calculated by the discrete dipole approximation method. Compared with the individual nanorod, the cross-shape nanostructure can generate high local electric fields at the lateral surface. Because of the electric field couplings between adjacent protruding parts, much enhanced electric fields always occur at the lateral surface of the cross-shape nanostructure, with the incident polarization direction varied. In addition, the effects of the structural parameters of the cross-shape nanostructures on their plasmonic properties are also investigated. These results would guide the preparation of the cross-shape nanostructures for their applications in surface enhanced Raman scattering.
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Keywords:
- Ag cross-shaped nanostructure /
- surface plasmon resonance /
- polarization /
- discrete dipole approximation
[1] 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 物理学报 57 3862]
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[3] Tian Z Q, Ren B, Wu D Y 2002 J. Phys. Chem. B 106 9463
[4] Vo-Dinh T 1998 Trac. Trends Anal. Chen. 17 557
[5] Zhang Z Y, Liu Y J, Zhao Q, Zhao Y P 2009 Appl. Phys. Lett. 94 143107
[6] Moskovits M 1985 Rev. Mod. Phys. 57 783
[7] Nie S M, Emory S R 1997 Science 275 1102
[8] Zhang Z Y, Zhao Y P 2006 Appl. Phys. Lett. 89 023110
[9] Zhang Z Y, Zhao Y P 2007 Appl. Phys. Lett. 90 221501
[10] Huang Q,Wang J, Cao L R, Sun J, Zhang X D, GengWD, 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 物理学报 58 1980]
[11] Kelly K L, Coronado E, Zhao L L, Schatz G C 2003 J. Phys. Chem. B 107 668
[12] Hong X, Do D D, Qiu Z R, Zhang G X 2007 Acta Phys. Sin. 56 7219 (in Chinese) [洪昕, 杜丹丹, 裘祖荣, 张国雄 2007 物理学报 56 7219]
[13] Li X L, Zhang Z D, Wang H Y, Xiong Z H, Zhang Z Y 2011 Acta Phys. Sin. 60 047807 (in Chinese) [李雪莲, 张志东, 王红艳, 熊祖洪, 张中月 2011 物理学报 60 047807]
[14] Zhang Z Y, Zhao Y P 2007 J. Appl. Phys. 102 113308
[15] Nikoobakht B, Wang J P, El-sayed M A 2002 Chem. Phys. Lett. 366 17
[16] Chaney S B, Shanmukh S, Dluhy R A, Zhao Y P 2005 Appl. Phys. Lett. 87 031908
[17] Tao A, Kim F, Hess C, Goldberger J, He R, Sun Y, Xia Y, Yang P 2003 Nano Lett. 3 1229
[18] Zhao Y P, Chaney S B, Shanmukh S, Dluhy 2006 J. Phys. Chem. B 110 3153
[19] Flatau P J, Stephens G L, Draine B T 1990 J. Opt. Soc. Am. A 7 593
[20] Jensen T, Kelly L, Lazarides A, Schatz G C 1999 J. Cluster Sci. 10 295
[21] Johnson P B, Christy R W 1972 Phys. Rev. B 6 4370
[22] Lidj N F, Aubard J, Georges L V 1999 J. Chem. Phys. 111 1195
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[1] 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 物理学报 57 3862]
[2] Campion A, Kambhampati P 1998 Chem. Soc. Rev. 27 241
[3] Tian Z Q, Ren B, Wu D Y 2002 J. Phys. Chem. B 106 9463
[4] Vo-Dinh T 1998 Trac. Trends Anal. Chen. 17 557
[5] Zhang Z Y, Liu Y J, Zhao Q, Zhao Y P 2009 Appl. Phys. Lett. 94 143107
[6] Moskovits M 1985 Rev. Mod. Phys. 57 783
[7] Nie S M, Emory S R 1997 Science 275 1102
[8] Zhang Z Y, Zhao Y P 2006 Appl. Phys. Lett. 89 023110
[9] Zhang Z Y, Zhao Y P 2007 Appl. Phys. Lett. 90 221501
[10] Huang Q,Wang J, Cao L R, Sun J, Zhang X D, GengWD, 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 物理学报 58 1980]
[11] Kelly K L, Coronado E, Zhao L L, Schatz G C 2003 J. Phys. Chem. B 107 668
[12] Hong X, Do D D, Qiu Z R, Zhang G X 2007 Acta Phys. Sin. 56 7219 (in Chinese) [洪昕, 杜丹丹, 裘祖荣, 张国雄 2007 物理学报 56 7219]
[13] Li X L, Zhang Z D, Wang H Y, Xiong Z H, Zhang Z Y 2011 Acta Phys. Sin. 60 047807 (in Chinese) [李雪莲, 张志东, 王红艳, 熊祖洪, 张中月 2011 物理学报 60 047807]
[14] Zhang Z Y, Zhao Y P 2007 J. Appl. Phys. 102 113308
[15] Nikoobakht B, Wang J P, El-sayed M A 2002 Chem. Phys. Lett. 366 17
[16] Chaney S B, Shanmukh S, Dluhy R A, Zhao Y P 2005 Appl. Phys. Lett. 87 031908
[17] Tao A, Kim F, Hess C, Goldberger J, He R, Sun Y, Xia Y, Yang P 2003 Nano Lett. 3 1229
[18] Zhao Y P, Chaney S B, Shanmukh S, Dluhy 2006 J. Phys. Chem. B 110 3153
[19] Flatau P J, Stephens G L, Draine B T 1990 J. Opt. Soc. Am. A 7 593
[20] Jensen T, Kelly L, Lazarides A, Schatz G C 1999 J. Cluster Sci. 10 295
[21] Johnson P B, Christy R W 1972 Phys. Rev. B 6 4370
[22] Lidj N F, Aubard J, Georges L V 1999 J. Chem. Phys. 111 1195
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