| 论介质与金属样品近场电磁场散射 |
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| 引用本文： | 余梅引,马业万.论介质与金属样品近场电磁场散射[J].安庆师范学院学报(自然科学版),2008,14(1):21-23. |
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| 作者姓名： | 余梅引 马业万 |
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| 作者单位： | 怀宁中学,安徽,怀宁,246022;安庆师范学院,物理与电气工程学院,安徽,安庆,246133 |
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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。
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| 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 |
| 文章编号： | 1007-4260(2008)01-0021-03 |
| 修稿时间： | 2007年6月1日 |
Discussing on Near-field Electromagnetic Scattering on Medium and Metallic Sample |
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| YU Mei-yin,MA Ye-wan.Discussing on Near-field Electromagnetic Scattering on Medium and Metallic Sample[J].Journal of Anqing Teachers College(Natural Science Edition),2008,14(1):21-23. |
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| Authors: | YU Mei-yin MA Ye-wan |
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| Abstract: | 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. |
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| Keywords: | Green function complex-conjugate gradient method-Fast Fourier transform surface plasmon polaritons |
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