中国物理B ›› 2010, Vol. 19 ›› Issue (12): 127806-127806.doi: 10.1088/1674-1056/19/12/127806

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Plasmonic interactions between a perforated gold film and a thin gold film

付少丽1, 徐海清1, 吴金军1, 周昕2, 李宏建2, 谢素霞2   

  1. (1)College of Physics Science and Technology, Central South University, Changsha 410083, China; (2)College of Physics Science and Technology, Central South University, Changsha 410083, China;College of Materials Science and Engineering, Central South University, Changsha 410083, China
  • 收稿日期:2010-01-31 修回日期:2010-04-05 出版日期:2010-12-15 发布日期:2010-12-15
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 60708014), the Science Foundation for Post-doctorate of China (Grant No. 2004035083), the Natural Science Foundation of Hunan Province of China (Grant No. 06JJ2034), the Excellent Doctorate Dissertation Foundation of Central South University (Grant No. 2008yb039) and the Hunan Provincial Innovation Foundation for Postgraduate (Grant No. CX2009B029).

Plasmonic interactions between a perforated gold film and a thin gold film

Zhou Xin(周昕)a)b), Li Hong-Jian(李宏建)a)b)†, Xie Su-Xia(谢素霞)a)b), Fu Shao-Li(付少丽)a),Xu Hai-Qing(徐海清)a), and Wu Jin-Jun(吴金军)a)   

  1. a College of Physics Science and Technology, Central South University, Changsha 410083, China; b College of Materials Science and Engineering, Central South University, Changsha 410083, China
  • Received:2010-01-31 Revised:2010-04-05 Online:2010-12-15 Published:2010-12-15
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 60708014), the Science Foundation for Post-doctorate of China (Grant No. 2004035083), the Natural Science Foundation of Hunan Province of China (Grant No. 06JJ2034), the Excellent Doctorate Dissertation Foundation of Central South University (Grant No. 2008yb039) and the Hunan Provincial Innovation Foundation for Postgraduate (Grant No. CX2009B029).

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摘要： Based on the finite difference time domain method, we investigated theoretically the optical properties and the plasmonic interactions between a gold film perforated with periodic sub-wavelength holes and a thin gold film. We showed that the plasmon resonant energies and intensities depend strongly on the thicknesses of the two films and the lattice constant. Based on the distributions of normal electric field component Ez, tangential electric field component Ey and total energy, we showed that the optical transmission is due to the collaboration of the localized waveguide resonance, the surface plasmon resonance and the coupling of the flat-surface plasmon of the two layers.

Abstract: Based on the finite difference time domain method, we investigated theoretically the optical properties and the plasmonic interactions between a gold film perforated with periodic sub-wavelength holes and a thin gold film. We showed that the plasmon resonant energies and intensities depend strongly on the thicknesses of the two films and the lattice constant. Based on the distributions of normal electric field component Ez, tangential electric field component Ey and total energy, we showed that the optical transmission is due to the collaboration of the localized waveguide resonance, the surface plasmon resonance and the coupling of the flat-surface plasmon of the two layers.

Key words: plasmonic interaction, localized waveguide resonance, surface plasmon resonance, surface plasmon coupling

中图分类号:  (Thin film structure and morphology)

  • 68.55.-a
73.20.Mf (Collective excitations (including excitons, polarons, plasmons and other charge-density excitations)) 78.66.Bz (Metals and metallic alloys)