期刊文献+

金属纳米结构波导激发表面等离子体的光学特性 被引量:4

Optical Properties of Surface Plasmons Excited by Metallic Nanostructure Waveguides
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摘要 先后在脉冲平面波和环形高数值孔径聚焦倏逝场两种不同的入射场条件下,使用时域有限差分(FDTD)方法对金属平行纳米棒结构和U型纳米结构的表面等离子体(SPs)激发特性进行了仿真研究。在脉冲平面波入射条件下,发现两种纳米结构在可见光波段具有相同的表面等离子体共振(SPR)激发波长。在此波长的线偏振光环形聚焦倏逝场中对这两纳米结构激发SPs的特性进行了仿真。结果表明,U型纳米结构具有最佳的局域场增强和远场传导能力,可构成等离子体光镊用以捕获纳米粒子。 The excitation properties of the surface plasmons(SPs) excited by the metallic parallelnanorod and U-shaped nanostructures are simulated under the illumination field conditions of pulse plane wave and circular high numerical aperture focal evanescent field using the finite difference time domain(FDTD) method.Under the illumination of pulse plane wave,the two nanostructures present the same surface plasmon resonance(SPR) wavelength in the visible range.After that,we simulate the excitation properties of SPs excited by the two nanostructures in the fields of the circular high numerical aperture focal evanescent beam with the same SPR wavelength.The simulation results indicate that the Ushaped nanostructure performs the best local field enhancement and far field transmission ability,which can be used to construct a plasmonic tweezer for trapping nanoparticles.
出处 《激光与光电子学进展》 CSCD 北大核心 2011年第4期93-97,共5页 Laser & Optoelectronics Progress
基金 广西制造系统与先进制造技术重点实验室开放课题(桂科能07109008_026_K)资助课题
关键词 表面光学 远场传导 时域有限差分方法 表面等离子体 纳米结构波导 optics at surfaces far field transmission finite difference time domain surface plasmons nanostructure waveguide
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参考文献15

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二级参考文献47

共引文献33

同被引文献116

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