近年来,关于发生在直径远大于入射光波长的圆柱或圆球散射体外表面的光学喷射翼的研究受到了很多关注。本文采用严格的Mie散射理论,借助计算机仿真软件Matlab 7.1,模拟计算出关于单个球体散射体电磁场在圆球内部以及圆球外部近场的空间分布。实验中,我们对电磁场边界条件的数值误差进行了检查,讨论了平面波入射下,在圆球外表面产生的光学喷射翼的一些基本性质,如喷射翼衰减长度、光强峰值及其空间位置。同时,我们详细分析了出现在圆球内部的两处显著光强峰的基本性质。另外,散射球体半径以及折射率对空间电磁场的影响在文中得以分析,相关的解释在文中得以提出。

To better understand the characteristics of photonic jets which are generated at the shadow side surfaces of cylindrical or spherical scatterer with their diameters much larger than the wavelength,we used the rigorous Mie theory,with the software Matlab 7.1,to calculate the spatial distribution of the near-field external and internal electromagnetic field of a single spherical scatterer.The numerical errors of the boundary condition are checked and the basic properties of photonic jets outside the spheres in the linearly polarized case,namely the magnitude and location of the intensity peak and the decay length,are discussed.Two distinctive intensity peaks inside the sphere are also analyzed.Besides,the influence of the radius and the refractive index of the sphere on the total field are determined,and explanations are proposed.