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厄米-高斯波束对各向异性圆柱的散射特性研究

Scattering characteristics of Hermite-Gaussian beam on anisotropic cylinder

  • 摘要: 为了研究厄米-高斯波束在各向异性媒质中的散射特性,采用了将各向异性圆柱的散射场和内部场用圆柱矢量波函数展开,应用电磁场边界条件和投影法,提出了一种分析单轴各向异性圆柱对厄米-高斯波束散射特性研究的精确半解析方法; 获得了厄米-高斯波束通过单轴各向异性圆柱的内场以及近场的归一化强度分布图; 对两种不同的厄米高斯波束入射情形做出了分析和对比。结果表明,两种波束在通过圆柱后都有入射波和反射波叠加而成的驻波现象,而TEM10(x′)模式厄米-高斯波束入射后近场强度增强,且有明显的折射现象。该研究结果对厄米-高斯波束的应用具有一定的参考价值。

     

    Abstract: In order to research the scattering properties of Hermite-Gaussian beams in anisotropic media, the paper used a cylindrical vector wave function for the scattering field and internal field of an anisotropic cylinder. Using electromagnetic field boundary conditions and projection method, a method was proposed. The accurate semi-analytical method for studying the scattering properties of Hermite-Gaussian beams from uniaxial anisotropic cylinders was analyzed. The normalized intensity distributions of both the internal-field and near fields of the Hermitian-Gaussian beams through an uniaxial anisotropic cylinder were obtained. The analysis and comparison of two different Hermitage beam incidents were carried out. The results show that both beams have a standing wave phenomenon caused by the superposition of incident and reflected waves after passing through the cylinder, while the TEM10(x′) mode Hermite-Gaussian beam has a enhanced near-field intensity and a significant refraction phenomenon after its incidence. The research results have certain reference value for the application of Hermite-Gaussian beam.

     

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