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同心椭圆柱-纳米管结构的双重Fano共振研究

张兴坊 刘凤收 闫昕 梁兰菊 韦德全

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同心椭圆柱-纳米管结构的双重Fano共振研究

张兴坊, 刘凤收, 闫昕, 梁兰菊, 韦德全

Double Fano resonance in gold nanotube embedded with a concentric elliptical cylinder

Zhang Xing-Fang, Liu Feng-Shou, Yan Xin, Liang Lan-Ju, Wei De-Quan
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  • 提出了一种同心椭圆柱-纳米管复合结构, 该结构由金纳米管中内嵌椭圆形金柱构成, 利用时域有限差分法分析了尺寸参数、周围环境及纳米管内核材料对该结构光学性质的影响. 结果表明, 调节椭圆柱芯的旋转角度可产生双重偶极-偶极Fano共振, 其主要是由椭圆柱芯的纵向或横向偶极共振模式与纳米管的偶极成键和反成键模式杂化形成的超辐射成键模式和亚辐射成键模式之间的相互作用产生的, 且共振特性可通过调节复合结构的尺寸参数控制, 随椭圆柱长轴或短轴的增大而红移, 随纳米管外径的增大或整体尺寸的减小而蓝移, 当纳米管内径增大时高频Fano共振随着红移, 而低频Fano共振先蓝移再红移, 同时其对外界环境的变化不敏感, 但对纳米管内核材料变化有着较好的响应. 利用等离激元杂化理论对该现象进行了解释. 这些结果可为构造其他类型的多波段Fano共振二维或三维纳米结构提供一种新的方式.
    Optical properties of the concentric composite nanostructure composed of gold nanotube around the center gold elliptical core are investigated based on the finite difference time domain method. According to the simulated absorption and scattering spectra, electric field distributions and charge distributions, we can generate double dipole-dipole Fano resonances by adjusting the angle between the elliptical cylinder core and the linearly polarized excitation light, which is due mainly to the interference between the subradiant dipole mode and the superradiant dipole mode. The narrow, low-energy subradiant mode originates from the symmetric hybrization between the longitudinal or transverse dipole mode of the elliptical cylinder core and the dipole bonding mode of the nanotube, and the broad, high-energy superradiant mode originates from the symmetric hybrization between the core’s dipole mode and the nanotube’s dipole antibonding mode. Moreover, the intensities and spectral positions of the two Fano resonances can be manipulated by modifying the geometric parameters of the composite structure. By increasing the semiminor axis of elliptical core, the high-energy Fano resonance red-shifts faster than the low-energy Fano resonance due to the increase of the interaction coupling between the transverse dipole mode of the core and the dipole mode of the nanotube, and becomes weaker in the scattering spectrum because of the reduced radiation intensity of the superradiant dipole mode. When the semimajor axis is changed, a similar phenomenon occurs in the low-energy Fano resonance. In addition, the two Fano resonances red-shift when outer radius of the nanotube increases, but the shift of low-frequency and high-frequency Fano resonance are inconsistent as the inner radius of the nanotube changes. The high-frequency Fano resonance red-shifts monotonically while the low-frequency Fano resonance first blue-shifts and then red-shifts with the increase of inner radius of nanotube because the red shift of the dipole bonding nanotube mode competes with the spectral shifts induced by the diminishing hybridization between elliptical core and nanotube mode. It can also be concluded that the dipole-dipole Fano resonances become apparent and higher order Fano resonance occurs when the composite nanostructure is scaled to a larger size due to the increased radiative damping. With the core and nanotube size fixed, Fano resonance is insensitive to the change of the external environment, but has a good response to the nuclear material of the nanotube.
      通信作者: 张兴坊, zxf4114@126.com
    • 基金项目: 国家自然科学基金(批准号: 61701434)、山东省自然基金(批准号: ZR2017MF005, ZR2018LF001)、山东省高等学校科技计划(批准号: J17KA087)和枣庄市光电信息功能材料与微纳器件重点实验室资助的课题.
      Corresponding author: Zhang Xing-Fang, zxf4114@126.com
    • Funds: Project supported by the National Natural Science Foundation of China (Grant No. 61701434), the Natural Science Foundation of Shandong Province, China (Grant Nos. ZR2017MF005, ZR2018LF001), the Project of Shandong Province Higher Education Science and Technology Program, China (Grant No. J17KA087), and the Key Laboratory of Optoelectronic Information Functional Materials and Micronano Devices in Zaozhuang, China.
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    Halas N J, Lal S, Chang W S, Nordlander P 2011 Chem. Rev. 111 3913Google Scholar

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    Hao F, Nordlander P, Sonnefraud Y, Dorpe P V, Maier S A 2009 ACS Nano 3 643Google Scholar

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    Li J, Liu T, Zheng H, Dong J, He E, Gao W, Han Q, Wang C, Wu Y 2014 Plasmonics 9 1439Google Scholar

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    Sonnefraud Y, Verellen N, Sobhani H, Vandenbosch G A E, Dorpe P, Nordlander P, Moshchalkov V V, Maier S A 2010 ACS Nano 4 1664Google Scholar

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    Sanchoparramon J, Jelovina D 2014 Nanoscale 6 13555Google Scholar

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    Ho J F, Boris L, Zhang J B 2012 Appl. Phys. A 107 133Google Scholar

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    Pena-Rodriguez O, Rivera A, Campoy-Quiles M, Pal U 2012 Nanoscale 5 209

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    Zhou H, Gao D, Gao L 2018 Plasmonics 13 623Google Scholar

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    Shao L, Fang C, Chen H, Man Y C, Wang J, Lin H Q 2012 Nano Lett. 12 1424Google Scholar

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    Li J, Gu Y, Gong Q 2010 Opt. Express 18 17684Google Scholar

    [13]

    Ci X, Wu B, Song M, Liu Y, Chen G, Wu E, Zeng H 2014 Appl. Phys. A 117 955Google Scholar

    [14]

    Yang Z J, Hao Z H, Lin H Q, Wang Q Q 2014 Nanoscale 6 4985Google Scholar

    [15]

    Cui Y, Zhou J, Tamma V A, Park W 2012 ACS Nano 6 2385Google Scholar

    [16]

    Fang Z, Cai J, Yan Z, Nordlander P, Halas N J, Zhu X 2011 Nano Lett. 11 4475Google Scholar

    [17]

    Zhang S, Bao K, Halas N J, Xu H, Nordlander P 2011 Nano Lett. 11 1657Google Scholar

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    Velichko E A, Nosich A I 2013 Opt. Lett. 38 4978Google Scholar

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    Yu H Q, Jiang S M, Wu D J 2015 J. Appl. Phys. 117 153101Google Scholar

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    丛超, 吴大建, 刘晓峻 2011 物理学报 60 046102Google Scholar

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    [22]

    Zhu J, Li J J, Zhao J W 2013 J. Phys. Chem. C 117 584Google Scholar

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    Zhang J, Zayats A 2013 Opt. Express 21 8426Google Scholar

    [24]

    Wu D J, Yu H Q, Jiang S M, Wu X W, Liu X J 2014 Sci. China 57 1063Google Scholar

    [25]

    Wu D, Jiang S, Cheng Y 2012 Opt. Express 20 26559Google Scholar

    [26]

    Chen H L, Gao L 2013 Opt. Express 21 23619Google Scholar

    [27]

    Gao D, Gao L, Novitsky A, Novitsky A, Chen H, Boris L 2015 Opt. Lett. 40 4162Google Scholar

    [28]

    Taflove A, Hagness S 2000 Computational Electrodynamics: the Finite-Difference Time-Domain Method (Vol.2)(Boston: Artech House) pp75−85

    [29]

    Johnson P B, Christy R W 1972 Phys. Rev. B 6 4370Google Scholar

    [30]

    Mukherjee S, Sobhani H, Lassiter J B, Bardhan R, Nordlander P, Halas N J 2010 Nano Lett. 10 2694Google Scholar

    [31]

    潘庭婷, 曹文, 邓彩松, 王鸣, 夏巍, 郝辉 2018 物理学报 67 157301Google Scholar

    Pan T T, Cao W, Deng C S, Wang M, Xia W, Hao H 2018 Acta Phys. Sin. 67 157301Google Scholar

  • 图 1  椭圆柱芯-纳米管同心复合结构模型示意图

    Fig. 1.  Geometrical structure of Au elliptical cylinder-nanotube concentric nanostructure.

    图 2  金纳米管复合结构的吸收(虚线)、散射(实线)光谱与椭圆柱芯旋转角度的关系

    Fig. 2.  Relationship between absorption (dotted line) and scattering (solid line) spectra of gold nanotube composite structure and rotation direction of the elliptical cylinder core.

    图 3  金纳米管复合结构的等离激元共振杂化示意图 (a) SiO2核-金壳; (b)复合结构; (c)金椭圆柱分别在θ = 0°和90°时的散射光谱; 插图为共振时各个结构的电荷分布图

    Fig. 3.  Plasmon hybridization in a nanotube composite structure. Scattering spectra for (a) SiO2-core Au-shell nanotube in vacuum, (b) composite structure and (c) Au elliptical cylinder embedded in SiO2. Inset shows the surface charge distributions at the corresponding resonance energies.

    图 4  复合结构的散射谱随椭圆芯长轴的变化(内插图为复合结构在峰值波长的电场分布)

    Fig. 4.  Scattering spectra of nanotube composite structure as a function of the semimajor axis a. Inset shows electric field distributions corresponding to each peak in the scattering spectra, the numbers in white indicate the maximum electric field enhancements.

    图 5  金纳米管复合结构的散射谱随椭圆芯短轴的变化(内插图为b = 35, 50 nm时复合结构在峰值波长的电场分布)

    Fig. 5.  Scattering spectra of nanotube composite structure as a function of the semiminor axis b. Inset shows electric field distributions corresponding to scattering spectral peak for b = 35 and 50 nm.

    图 6  散射谱随纳米管(a)外径和(b)内径的变化

    Fig. 6.  Scattering spectra of composite structure with different (a) R and (b) r.

    图 7  金纳米管复合结构的散射谱随整体尺寸的变化

    Fig. 7.  Scattering spectra of nanotube composite structure scaled to different sizes.

    图 8  散射谱随(a)外界环境$\scriptstyle {\varepsilon _4}$和(b)纳米管内核材料$\scriptstyle {\varepsilon _2}$的变化

    Fig. 8.  Scattering spectra of composite structure with different (a) $\scriptstyle {\varepsilon _4}$ and (b) $ \scriptstyle{\varepsilon _2}$.

  • [1]

    Liang H Y, Wei H, Xu H X 2016 Front. Phys. 11 117301Google Scholar

    [2]

    Chen W, Hu H, Jiang W, Xu Y, Zhang S, Xu H 2018 Chin. Phys. B 27 107403Google Scholar

    [3]

    Halas N J, Lal S, Chang W S, Nordlander P 2011 Chem. Rev. 111 3913Google Scholar

    [4]

    Hao F, Nordlander P, Sonnefraud Y, Dorpe P V, Maier S A 2009 ACS Nano 3 643Google Scholar

    [5]

    Li J, Liu T, Zheng H, Dong J, He E, Gao W, Han Q, Wang C, Wu Y 2014 Plasmonics 9 1439Google Scholar

    [6]

    Sonnefraud Y, Verellen N, Sobhani H, Vandenbosch G A E, Dorpe P, Nordlander P, Moshchalkov V V, Maier S A 2010 ACS Nano 4 1664Google Scholar

    [7]

    Sanchoparramon J, Jelovina D 2014 Nanoscale 6 13555Google Scholar

    [8]

    Ho J F, Boris L, Zhang J B 2012 Appl. Phys. A 107 133Google Scholar

    [9]

    Pena-Rodriguez O, Rivera A, Campoy-Quiles M, Pal U 2012 Nanoscale 5 209

    [10]

    Zhou H, Gao D, Gao L 2018 Plasmonics 13 623Google Scholar

    [11]

    Shao L, Fang C, Chen H, Man Y C, Wang J, Lin H Q 2012 Nano Lett. 12 1424Google Scholar

    [12]

    Li J, Gu Y, Gong Q 2010 Opt. Express 18 17684Google Scholar

    [13]

    Ci X, Wu B, Song M, Liu Y, Chen G, Wu E, Zeng H 2014 Appl. Phys. A 117 955Google Scholar

    [14]

    Yang Z J, Hao Z H, Lin H Q, Wang Q Q 2014 Nanoscale 6 4985Google Scholar

    [15]

    Cui Y, Zhou J, Tamma V A, Park W 2012 ACS Nano 6 2385Google Scholar

    [16]

    Fang Z, Cai J, Yan Z, Nordlander P, Halas N J, Zhu X 2011 Nano Lett. 11 4475Google Scholar

    [17]

    Zhang S, Bao K, Halas N J, Xu H, Nordlander P 2011 Nano Lett. 11 1657Google Scholar

    [18]

    Velichko E A, Nosich A I 2013 Opt. Lett. 38 4978Google Scholar

    [19]

    Yu H Q, Jiang S M, Wu D J 2015 J. Appl. Phys. 117 153101Google Scholar

    [20]

    丛超, 吴大建, 刘晓峻 2011 物理学报 60 046102Google Scholar

    Cong C, Wu D J, Liu X J 2011 Acta Phys. Sin. 60 046102Google Scholar

    [21]

    Xu H, Li H, Liu Z, Xie S, Fu S, Zhou X 2012 Opt. Commun. 285 3202Google Scholar

    [22]

    Zhu J, Li J J, Zhao J W 2013 J. Phys. Chem. C 117 584Google Scholar

    [23]

    Zhang J, Zayats A 2013 Opt. Express 21 8426Google Scholar

    [24]

    Wu D J, Yu H Q, Jiang S M, Wu X W, Liu X J 2014 Sci. China 57 1063Google Scholar

    [25]

    Wu D, Jiang S, Cheng Y 2012 Opt. Express 20 26559Google Scholar

    [26]

    Chen H L, Gao L 2013 Opt. Express 21 23619Google Scholar

    [27]

    Gao D, Gao L, Novitsky A, Novitsky A, Chen H, Boris L 2015 Opt. Lett. 40 4162Google Scholar

    [28]

    Taflove A, Hagness S 2000 Computational Electrodynamics: the Finite-Difference Time-Domain Method (Vol.2)(Boston: Artech House) pp75−85

    [29]

    Johnson P B, Christy R W 1972 Phys. Rev. B 6 4370Google Scholar

    [30]

    Mukherjee S, Sobhani H, Lassiter J B, Bardhan R, Nordlander P, Halas N J 2010 Nano Lett. 10 2694Google Scholar

    [31]

    潘庭婷, 曹文, 邓彩松, 王鸣, 夏巍, 郝辉 2018 物理学报 67 157301Google Scholar

    Pan T T, Cao W, Deng C S, Wang M, Xia W, Hao H 2018 Acta Phys. Sin. 67 157301Google Scholar

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出版历程
  • 收稿日期:  2018-12-22
  • 修回日期:  2019-01-16
  • 上网日期:  2019-03-01
  • 刊出日期:  2019-03-20

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