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论介质与金属样品近场电磁场散射

Discussing on Near-field Electromagnetic Scattering on Medium and Metallic Sample
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摘要 利用电磁场散射理论-格林函数法数值模拟近场电磁场散射问题,运用共轭梯度法与快速傅立叶变换法进行求解,数值模拟结果表明:对介质样品来说,TE波反映样品突变,TM波反映样品的形貌,且当大尺寸的样品时,电磁场的干涉效应很明显;对金属样品来说,TE,TM波均表现为样品的突起,样品的形貌非常复杂,而且电磁场的场强沿Z轴增强很强,这点符合金属表面等离子共振现象。 Making use of an electromagnetism field scattering theory, Green function method, we simulate near--field electromagnetic scattering numerically. To solve the problem, we use the methods of complex--conjugate gradient method （CCGM） and Fast Fourier transform （FFT）. The results indicate that the near--field imaging is an intricate whose degree is related to the sample size and distances; and the imaging of TE wave and TM wave explain it for dielectric, respectively; but for metallic dielectric, both TE wave and TM wave explain intricate near--field imaging, and the roles of electrical field is along the Z axis-- evanescent wave, which match metals surface plasmon resonance phenomenon.
作者 余梅引 马业万
机构地区 怀宁中学 安庆师范学院物理与电气工程学院
出处 《安庆师范学院学报（自然科学版）》 2008年第1期21-23,共3页 Journal of Anqing Teachers College(Natural Science Edition)
关键词 格林函数 复共轭梯度法—快速傅立叶变换 表面等离子共振 Green function complex-- conjugate gradient method-- Fast Fourier＇transform surface plasmon polaritons
分类号 O441 [理学—电磁学]
作者简介 余梅引，女，安徽怀宁人，怀宁中学教师。
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参考文献10

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安庆师范学院学报（自然科学版）
2008年 第1期

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