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本文基于时域有限差分方法(finite difference time domain, FDTD)研究了入射光波长、入射光偏振方向、纳米管几何形状、 管壁厚度及内核和包埋介质的变化对椭圆截面金纳米管近场分布特征的影响. 研究发现, 入射光波长为纳米管等离激元共振波长时, 纳米管近场增强最大; 入射光偏振方向与椭圆长轴夹角的增加会导致管内的场强迅速增大; 椭圆管半短轴变大可以调节纳米管场强分布从两端高、中间低变化为均匀分布; 内核和包埋介质介电常数的增大均会使得纳米管内部及周围场强逐渐减弱.
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关键词:
- 局域表面等离激元共振 /
- 金纳米管 /
- 时域有限差分方法 /
- 近场增强
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[25] Hendren W R, Murphy A, Evans P, Connor D, Wurtz G A, Zayats A V, Atkinson R, Pollard R J 2008 J. Phys.: Condens. Matter 20 362203
[26] Cong C, Wu D J, Liu X J 2011 Acta Phys. Sin. 60 046102 (in Chinese) [丛超, 吴大建, 刘晓峻 2011 物理学报 60 046102]
[27] Wu D J, Liu X J, Li B 2011 J. Appl. Phys. 109 083540
[28] Mock J J, Hill R T, Degiron A, Zauscher S, Chilkoti A, Smith D R 2008 Nano Lett. 8 2245
[29] Wei H, Hao F, Huang Y Z, Wang W Z, Nordlander P, Xu H X 2008 Nano Lett. 8 2497
[30] Brewer S H, Anthireya S J, Lappi S E, Drapcho D L, Franzen S 2002 Langmuir 18 4460
[31] Oldenburg S J, Hale G D, Radloff C, Halas N J 1999 Appl. Phys. Lett. 75 1063
[32] Prodan E, Radloof C, Halas N J, Nordlander P 2003 Science 302 419
[33] Zhu J 2007 Appl. Phys. A 88 673
-
[1] Krenn J R, Dereux A, Weeber J C, Bourillot E, Lacroute Y, Goudonnet J P 1999 Phys. Rev. Lett. 82 2590
[2] Maier S A, Brongersma M L, Kik P G, Meltzer S, Requicha A A G, Atwater H A 2001 Adv. Mater. 13 1501
[3] Quinten M, Leitner A, Krenn J R, Aussenegg F R 1998 Opt. Lett. 23 1331
[4] Maier S A, Kik P G, Atwater H A, Meltzer S, Harel E, Koel B E, Requicha A A G 2003 Nat. Mater. 2 229
[5] Zhang H X, Gu Y, Gong Q H 2008 Chin. Phys. B 17 2567
[6] Kundu J, Le F, Nordlander P, Halas N J 2008 Chem. Phys. Lett. 452 115
[7] Neuendorf R, Quinten M, Kreibig U 1996 J. Chem. Phys. 104 6348
[8] Bohren C F, Huffman D R 1983 Absorption and scattering of light by small particles (New York: Wiley)
[9] Westcott S L, Jackson J B, Radloff C, Halas N J 2002 Phys. Rev. B 66 155431
[10] Wu D J, Xu X D, Liu X J 2008 J. Chem. Phys. 129 074711
[11] Prodan E, Radloof C, Halas N J, Nordlander P 2003 Science 302 419
[12] Prodan E, Nordlander P, Halas N J 2003 Nano Lett. 3 1411
[13] Schelm S, Smith G B 2005 J. Phys. Chem. B 109 1689
[14] Prodan E, Nordlander P 2004 J. Chem. Phys. 120 5444
[15] Westcott S L, Jackson J B, Radloff C, Halas N J 2002 Phys. Rev. B 66 155431
[16] Averitt R D, Westcott S L, Halas N J 1999 J. Opt. Soc. Am. B 16 1824
[17] Averitt R D, Sarkar D, Halas N J 1997 Phys. Rev. Lett. 78 4217
[18] Wu D J, Liu X J 2008 Acta Phys. Sin. 57 5138 (in Chinese) [吴大建, 刘晓峻 2008 物理学报 57 5138]
[19] Wu D J, Liu X J 2010 Appl. Phys. Lett. 97, 061904
[20] Wu D J, Liu X J 2010 Appl. Phys. Lett. 96, 151912
[21] Zhu J, Bai S W, Zhao J W, Li J J 2009 Appl. Phys. A 97 431
[22] Leveque G, Martin O J F 2006 Opt. Express 14 9971
[23] Limmer S J, Chou T P, Cao G Z 2003 J. Phys. Chem. B 107 13313
[24] Mock J J, Oldenburg S J, Smith D R, Schultz D A, Schultz S 2002 Nano Lett. 2 465
[25] Hendren W R, Murphy A, Evans P, Connor D, Wurtz G A, Zayats A V, Atkinson R, Pollard R J 2008 J. Phys.: Condens. Matter 20 362203
[26] Cong C, Wu D J, Liu X J 2011 Acta Phys. Sin. 60 046102 (in Chinese) [丛超, 吴大建, 刘晓峻 2011 物理学报 60 046102]
[27] Wu D J, Liu X J, Li B 2011 J. Appl. Phys. 109 083540
[28] Mock J J, Hill R T, Degiron A, Zauscher S, Chilkoti A, Smith D R 2008 Nano Lett. 8 2245
[29] Wei H, Hao F, Huang Y Z, Wang W Z, Nordlander P, Xu H X 2008 Nano Lett. 8 2497
[30] Brewer S H, Anthireya S J, Lappi S E, Drapcho D L, Franzen S 2002 Langmuir 18 4460
[31] Oldenburg S J, Hale G D, Radloff C, Halas N J 1999 Appl. Phys. Lett. 75 1063
[32] Prodan E, Radloof C, Halas N J, Nordlander P 2003 Science 302 419
[33] Zhu J 2007 Appl. Phys. A 88 673
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