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采用离散偶极子近似方法计算了内嵌圆饼空心方形银纳米结构的消光光谱以及其近场的电场强度分布，并进一步与空心方形纳米结构的消光光谱和表面电场做比较. 结果表明，在耦合作用下内嵌圆饼空心方形银纳米结构不仅产生了新的共振模式，而且新的共振模式在传统表面增强拉曼散射的激发波长范围内，进而可以弥补由于实验上运用纳米切片法所制备的空心方形纳米结构尺寸较大导致其共振吸收峰在远红外波长范围的不足. 此外，可以通过改变内嵌圆饼空心方形银纳米结构的形貌参数调节其表面等离子体共振峰的共振波长，以满足在表面增强拉曼散射、生物分子或化学分子探测上的应用.In this paper, we calculate the extinction spectra and the distribution of electric near-field of the nanoparticles which are embedded a disk in a hollow square structure through using the discrete dipole approximation method, and compare our results with extinction spectra and the distribution of electric near-field of the single hollow square nanostructure. The research results show that a new resonant mode, which is located in the traditional excitation wavelength range of surface enhanced raman scattering, can be produced due to the coupling interaction. Then, we can use this mode to meet the shortage of the hollow square nanostructure fabricated by nanoskiving. In addition, the surface plasmon resonance peak can be tuned by changing the shape parameters of the silver nanoparticle. These results can be used in Raman scattering, molecular biological, and chemical detection.
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Keywords:
- surface plasmon resonance /
- plasmon resonance extinction spectra /
- discrete dipole approximation /
- electric field coupling
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[12] Zhang Z Y, Zhao Y P 2007 J. Appl. Phys. 102 3308
[13] Mo D, Liu J, Duan J L, Yao H J, Hou M D, Sun Y M, Chen Y F, Xue Z H, Zhang L 2009 Acta Phys. Sin. 58 2599 (in Chinese) [莫丹, 刘杰, 段敬来, 姚慧君, 侯明东, 孙友梅, 陈艳峰, 薛智浩, 张苓 2009 58 2599]
[14] 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 60 047807]
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[16] Barbillon G, Bijeon J L, Plain J, Royer P 2009 Thin Solid Films 517 2997
[17] Zhang Z Y, Xiong Z H 2010 Sci. China: Phys. Mech. Astron. 40 330 (in Chinese) [张中月, 熊祖洪 2010 中国科学: 物理学 力学 天文学 40 330]
[18] Li S, Zhong M L, Zhang L J, Xiong Z H, Zhang Z Y 2011 Acta Phys. Sin. 60 087806 (in Chinese) [李山, 钟明亮, 张礼杰, 熊祖洪, 张中月 2011 60 087806]
[19] Xu Q B, Bao J M, Rioux R M 2007 Nano Lett. 7 2800
[20] Purcell E M, Pennypacker C R 1973 Astrophys. J. 186 705
[21] Draine B T 1988 Astrophys. J. 333 848
[22] Draine B T, Goodman J J 1993 Astrophys. J. 405 685
[23] Draine B T, Flatau P J 1994 J. Opt. Soc. Am. A 11 1491
[24] Zhou F, Liu Y , Li Z Y 2011 Chin. Phys. B 20 037303
[25] 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] Wang K, Yang G, Long H, Li Y H, Dai N L, Lu P X 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]
[3] Zhao H J 2012 Chin. Phys. B 21 087104
[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] Zhong R B, Liu W H, Zhou J Liu S G 2012 Chin. Phys. B 21 117303
[6] Moskovits M 1985 Rev. Mod. Phys. 57 783
[7] Campion A, Kambhampati P 1998 Chem. Soc. Rev. 27 241
[8] Tian Z Q, Ren B, Wu D Y 2002 J. Phys. Chem. B 106 9463
[9] Vo-Dinh T 1998 TrAC Trends Anal. Chem. 17 557
[10] 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]
[11] Nie S, Emery S R 1997 Science 275 1102
[12] Zhang Z Y, Zhao Y P 2007 J. Appl. Phys. 102 3308
[13] Mo D, Liu J, Duan J L, Yao H J, Hou M D, Sun Y M, Chen Y F, Xue Z H, Zhang L 2009 Acta Phys. Sin. 58 2599 (in Chinese) [莫丹, 刘杰, 段敬来, 姚慧君, 侯明东, 孙友梅, 陈艳峰, 薛智浩, 张苓 2009 58 2599]
[14] 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 60 047807]
[15] Zhao S, Yin J B, Zhao X P 2010 Acta Phys. Sin. 59 3302 (in Chinese) [赵晟, 尹剑波, 赵晓鹏 2010 59 3302]
[16] Barbillon G, Bijeon J L, Plain J, Royer P 2009 Thin Solid Films 517 2997
[17] Zhang Z Y, Xiong Z H 2010 Sci. China: Phys. Mech. Astron. 40 330 (in Chinese) [张中月, 熊祖洪 2010 中国科学: 物理学 力学 天文学 40 330]
[18] Li S, Zhong M L, Zhang L J, Xiong Z H, Zhang Z Y 2011 Acta Phys. Sin. 60 087806 (in Chinese) [李山, 钟明亮, 张礼杰, 熊祖洪, 张中月 2011 60 087806]
[19] Xu Q B, Bao J M, Rioux R M 2007 Nano Lett. 7 2800
[20] Purcell E M, Pennypacker C R 1973 Astrophys. J. 186 705
[21] Draine B T 1988 Astrophys. J. 333 848
[22] Draine B T, Goodman J J 1993 Astrophys. J. 405 685
[23] Draine B T, Flatau P J 1994 J. Opt. Soc. Am. A 11 1491
[24] Zhou F, Liu Y , Li Z Y 2011 Chin. Phys. B 20 037303
[25] Johnson P B, Christy R W 1972 Phys. Rev. B 6 4370
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