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从广义米理论出发,将入射高斯波束用矢量球谐函数展开.根据对电磁场动量的讨论,得出了高斯波束对多层球形粒子的辐射俘获力的表示式,并就单高斯波束对在轴双层有吸收粒子受到的辐射俘获力进行了数值模拟,讨论了束腰半径、吸收系数、内外层相对厚度对俘获情况的影响.
Based on the theory of generalized rice, the incident Gaussian beam is expanded by a vector-spherical harmonic function.According to the discussion of electromagnetic field momentum, the expression of the radiation trapping force of multi-layer spherical particles by Gaussian beam is obtained, The numerical simulation of the radiation trapping force of double absorbed particles was carried out. The effects of beam waist radius, absorption coefficient and relative thickness of inner and outer layers on trapping were discussed.