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We experimentally investigate the dependences of the surface plasmon polarization (SPP) in the Ag nanowires on the polarizations of the excitation light and the emission light with a wavelength of excitation light 750nm. We find that the excitation and transmission efficiency change obviously with the polarization of incident light. However, the emission light is always linearly polarized light with an unchanged polarization direction. For the nanowires synthesized using a self-seeding process, their ends are axisymmetric. When the direction of the incident light is parallel to these Ag nanowires, the excitation and transmission efficiency of SPP are high. Conversely, when the polarization direction of the incident light is perpendicular to the wire axis, it is very low. For the nanowires with asymmetric ends, when the direction of the incident light has an angle with respect to the Ag nanowires, the excitation and transmission efficiency of SPP are high. While the polarization direction of emission light is always parallel to the wire axis which means that the polarization of the emission light does not depend on the polarization direction of the incident light. The polarization characteristics of the SPP in the thin Ag nanowires can realize the nanoscale manipulation of the intensity and polarization.
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Keywords:
- surface plasmon polarizations /
- Ag nanowires /
- waveguide /
- polarization
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[11] Manjavacas A, Garci a de Abajo F J 2009 Nano. Lett. 9 1285
[12] Wang L L, Ren X F, Liu A P, Liu L, Yong J C 2011 Appl. Phys. Lett. 99 061103
[13] Zhang L W, Zhao Y H, Wang Q, Fang K, Li W S, Qiao W T 2012 Acta Phys. Sin. 61 068401 (in Chinese) [张利伟, 赵玉环, 王勤, 方凯, 李卫彬, 乔文涛 2012 61 068401]
[14] Murphy C J, Jana N R 2002 Adv. Mater. 14 80
[15] Graff A, Wagner D, Ditlbacher H, Kreibig U 2005 Eur. Phys. J. D 34 263
[16] Harald D, Andreas H, Dieter W, Uwe K, Michael R, Ferdinand H, Franz R A, Joachim R K 2005 Phys. Rev. Lett. 95 257403
[17] Li Z P, Bao K, Fang Y R, Huang Y Z, Nordlander P, Xu H X 2010 Nano. Lett. 10 1831
[18] Chen Y T, Nielsen T R, Gregersen N, Lodahl P, Mork J 2010 Phys. Rev. B 81 125431
[19] Ruda H E, Shik A 2005 Phys. Rev. B 72 115308
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[1] William L B, Alain D, Thomas W E 2003 Nature 424 824
[2] Stefan A M 2005 Current. Nanoscience. 1 17
[3] Dai H, Wu X P, Xu H F, Wei M D 2009 Electrochemistry. Communications. 11 1599
[4] Maier S A, Kik P G, Atwater H A 2003 Nature. Materials. 2 229
[5] Guo X, Qiu M, Bao J M, Wiley B J, Yang Q, Zhang X N, Ma Y G, Yu H K, Tong L M 2009 Nano. Lett. 9 4515
[6] Zhu X L, Ma Y, Zhang J S, Xu J, Wu X F, Zhang Y 2010 Phys. Rev. Lett. 105 127402
[7] Aric W S, David A R, Benjamin J W, Xia Y N, Eric R D, Mark A R 2006 Nano. Lett. 6 1822
[8] Li Z P, Hao F, Huang Y Z, Fang Y R, Nordlander P, Xu H X 2009 Nano. Lett. 9 4383
[9] Zhong M L, Li S, Xiong Z H, Zhang Z Y 2012 Acta Phys. Sin. 61 027803 (in Chinese) [钟明亮, 李山, 熊祖洪, 张中月 2012 61 027803]
[10] Knight M W, Grady N K, Bardhan R, Hao F, Nordlander P, Halas N J 2007 Nano Lett. 7 2346
[11] Manjavacas A, Garci a de Abajo F J 2009 Nano. Lett. 9 1285
[12] Wang L L, Ren X F, Liu A P, Liu L, Yong J C 2011 Appl. Phys. Lett. 99 061103
[13] Zhang L W, Zhao Y H, Wang Q, Fang K, Li W S, Qiao W T 2012 Acta Phys. Sin. 61 068401 (in Chinese) [张利伟, 赵玉环, 王勤, 方凯, 李卫彬, 乔文涛 2012 61 068401]
[14] Murphy C J, Jana N R 2002 Adv. Mater. 14 80
[15] Graff A, Wagner D, Ditlbacher H, Kreibig U 2005 Eur. Phys. J. D 34 263
[16] Harald D, Andreas H, Dieter W, Uwe K, Michael R, Ferdinand H, Franz R A, Joachim R K 2005 Phys. Rev. Lett. 95 257403
[17] Li Z P, Bao K, Fang Y R, Huang Y Z, Nordlander P, Xu H X 2010 Nano. Lett. 10 1831
[18] Chen Y T, Nielsen T R, Gregersen N, Lodahl P, Mork J 2010 Phys. Rev. B 81 125431
[19] Ruda H E, Shik A 2005 Phys. Rev. B 72 115308
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