分形光柵的散射
SCATTERING BY FRACTAL GRATING
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摘要: 本文根據(jù)菲涅爾-基爾霍夫理論,研究了均勻Cantor集分形和Sierpinski地毯(carpet)分布光柵結(jié)構(gòu)的電磁(光)散射,計算了一維和二維分形光柵散射的強(qiáng)度分布,分析了它們的空間頻率分布特性.其數(shù)值結(jié)果表明,它們均具有明顯的分形特征和頻率選擇特性.
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關(guān)鍵詞:
- 分形; 光柵; 散射
Abstract: Based on Fresnel-Kirchhoff theory, the electromagnetic scattering from fractal gratings, which have structure on uniform Cantor sets or Siepinski carpet, is discussed. The scattering intensities of 1-dimensional and 2-dimensional fractal grating with different fractal dimension are calculated and their properties on spatial frequency distrubution are then analysed. The numerical results illustrate the fractal characteristics and frequency selectivities. -
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