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型谐振腔结构的光学透射特性

王维 高社生 孟阳

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型谐振腔结构的光学透射特性

王维, 高社生, 孟阳

Transmission characteristics of surface plasmon polaritons in -shaped resonator

Wang Wei, Gao She-Sheng, Meng Yang
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  • 应用有限元方法研究了在圆形谐振腔结构内嵌椭圆形棒(型谐振腔结构)的光学透射特性,结果表明,该结构对于光学滤波具有很强的可调性.另外,通过调节椭圆结构的倾斜角度破坏该结构的对称性,能够产生明显的法诺共振效应.这些结构对于光学滤波和折射率传感器结构的设计有一定的指导意义.
    To improve the efficiency of transmission, in this paper, we propose a structure of the surface plasmon polariton embedded in a sliver circular resonator with a sliver nanoellispod(-shaped resonator), and also investigate its optical properties by the finite element method. Firstly, we study the optical properties of -shaped resonator at a=120 nm and =0 with different values of b. The results show that the -shaped resonator structure has the narrow transmission peaks, and the transmittance spectrum can be tuned by modifying the structure parameters. So this nanostructure would find applications in the designing of the novel filter. Secondly, compared with the former Fano resonance which results from the localized plasmon resonance coupling, the Fano resonance which results from the resonance of the surface plasmon polaritons coupling is represented by this structure. When the symmetry of -shaped resonator is broken, the Fano resonance will be observed clearly. Like the Fano resonance which results from the localized plasmon resonance coupling between the bright mode of metallic nanostructure and the dark mode of metallic nanostructure, the results show that the dipolar, quadrupolar, and octupolar Fano resonances of -shaped resonator structure occur, which are caused by the destructive interference between the bright dipolar mode and the dark dipolar mode, quadrupolar mode, and octupolar mode. When we take the rotation angle as 0 and 90, 15 and 75, 30 and 90 respectively, the Fano asymmetric transmittance spectra of -shaped resonator are similar, which result from the same degree of asymmetry. The larger the degree of asymmetry of the -shaped resonator structure, the more obvious the Fano resonance is. Thirdly, the size of this structure has significant effects on the transmission peak positions, line width, and intensity of the Fano resonance, in particular, in the case that =0 corresponds to the generation of FR(FR on) and in the case corresponding to the vanishing of FR(FR off). therefore, this phenomenon of -shaped resonator will provide a new strategy for the surface plasmon polariton Fano switch. We hope that this nanostructure has potential applications in designing filter, biological sensors, and Fano switch.
      通信作者: 王维, wangweixgd@163.com
      Corresponding author: Wang Wei, wangweixgd@163.com
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    Habteyes T G, Dhuey S, Cabrini S, Schuck P J, Leone S R 2011 Nano Lett. 11 1819

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  • [1]

    Falk A L, Koppens F H L, Yu C L, Kang K, Snapp N D, Akimov A V, Jo M H, Lukin M D, Park H 2009 Nat. Phys. 5 475

    [2]

    Barnes W L, Dereux A, Ebbesen T W 2003 Nature 424 824

    [3]

    Dionne J A, Sweatlock L A, Atwater H A 2006 Phys. Rev. B 3 035407

    [4]

    Lee T W, Gray S 2005 Opt. Express 13 9652

    [5]

    Gao H, Shi H, Wang C, Du C, Luo X, Deng Q, L Y, Lin X, Yao H 2005 Opt. Express 13 10795

    [6]

    Hosseini A, Massoud Y 2007 Appl. Phys. Lett. 90 181102

    [7]

    Wang G X, Lu H, Liu X M, Mao D, Duan L N 2011 Opt. Express 19 3513

    [8]

    Yang Y R, Guan J F 2016 Acta Phys. Sin. 65 057301 (in Chinese)[杨韵茹, 关建飞2016物理学报65 057301]

    [9]

    Pang S F, Zhang Y Y, Huo Y P, Xie Y, Hao L M, Zhang T 2015 Plasmonics 10 1723

    [10]

    Han Z H, He S L 2007 Opt. Commun. 278 199

    [11]

    Gramotnev D K, Bozhevolnyi S I 2010 Nature Photon. 4 83

    [12]

    Barrow S J, Funston A M, Wei X Z, Mulvaney P 2013 Nano Today 8 138

    [13]

    Cetin A E, Altug H 2012 ACS Nano 11 9989

    [14]

    Jain P K, Huang X H, El-Sayed I H, El-Sayed M A 2007 Plasmonics 2 107

    [15]

    Thyagarajan K, Butet J, Martin O J F 2013 Nano Lett. 13 1847

    [16]

    Zhao K, Huo Y, Liu T, Li J, He B, Zhao T, Liu L, Li Y 2015 Plasmonics 10 1041

    [17]

    Sonnefraud Y, Verellen N, Sobhani H, Vandenbosch G A E, Moshchalkov V V, Dorpe P V, Nordlander P, Maier S A 2010 ACS Nano 3 1664

    [18]

    Habteyes T G, Dhuey S, Cabrini S, Schuck P J, Leone S R 2011 Nano Lett. 11 1819

    [19]

    Dregely D, Hentschel M, Giessen H 2011 ACS Nano 5 8202

    [20]

    Luo S, Fu T, Zhang Z Y 2013 Acta Phys. Sin. 62 147303 (in Chinese)[罗松, 付统, 张中月2013物理学报62 147303]

    [21]

    Feng H, Sonnefraud Y, Dorpe P V, Maier S A, Halas N J, Nordlander P 2008 Nano Lett. 11 3983

    [22]

    Fan J A, Bao K, Wu C, Bao J, Bardhan R, Halas N J, Manoharan V N, Shvets G, Nordlander P, Capasso F 2010 Nano Lett. 10 4680

    [23]

    Zhao K, Huo Y, Liu T, Wu Y, Zhao T, Liu L, Li Y, Deng J 2016 Plasmonics 10 1041

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出版历程
  • 收稿日期:  2016-04-01
  • 修回日期:  2016-09-25
  • 刊出日期:  2017-01-05

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