We investigate the optical response of passive (homogeneous) and active (doped by a magnetic-dipole source) silicon nanospheres placed above the gold substrate supporting excitation and propagation of surface plasmon polaritons (SPPs). In the case of the passive system, the influence of the particle electric and magnetic dipole resonances on the channeling of scattered light into the two channels: light-into-light and light-into-SPPs, is studied around the telecommunication wavelength range. Scattering efficiencies of both channels are analytically and numerically calculated and compared for different gaps between the nanosphere and gold substrate. Conditions, under which the resonant distribution of energy between SPPs and light channels can be approximately equal to each other, are revealed. In the case of an active system, associated with a magnetic dipole source embedded in a silicon resonator, two separate emission channels into light and into SPPs are considered as well. The radiation efficiency in each channel as a function of the gap is examined and compared. In particular, it is revealed the conditions when the efficiency of resonant light energy propagation along the two channels is practically equal to each other, and the Purcell factor achieves the value almost two times higher than for the case without the substrate. The obtained results elucidate the features introduced by the Mie dipole resonances of silicon nanospheres to control the light scattering (radiation) and the SPP excitation in dielectric/metal interface systems. The results obtained are perspectives for the development of new compact photonic and plasmonic devices operating at standard telecommunication wavelength ranges.

我们研究了放置在支持表面等离子体激元激发和传播的金基板上方的无源（均匀）和有源（由磁偶极子源掺杂）硅纳米球的光学响应（SPP）。在无源系统的情况下，围绕电信波长范围研究了粒子电偶极子共振对将散射光引导到两个通道：光到光和光到 SPP 的影响。对两个通道的散射效率进行分析和数值计算，并针对纳米球和金基板之间的不同间隙进行比较。揭示了 SPP 和光通道之间的能量共振分布可以大致相等的条件。在有源系统的情况下，与嵌入硅谐振器中的磁偶极子源相关联，还考虑了进入光和进入 SPP 的两个单独的发射通道。检查和比较每个通道中作为间隙函数的辐射效率。特别是，揭示了当共振光能量沿两个通道传播的效率实际上彼此相等时的条件，并且珀塞尔因子达到的值几乎是没有基板情况下的两倍。获得的结果阐明了由硅纳米球的米氏偶极共振引入的特征，以控制电介质/金属界面系统中的光散射（辐射）和 SPP 激发。获得的结果是开发在标准电信波长范围内工作的新型紧凑型光子和等离子体设备的前景。并且 Purcell 因子的值几乎是没有基板的情况下的两倍。获得的结果阐明了由硅纳米球的米氏偶极共振引入的特征，以控制电介质/金属界面系统中的光散射（辐射）和 SPP 激发。获得的结果是开发在标准电信波长范围内工作的新型紧凑型光子和等离子体设备的前景。并且 Purcell 因子的值几乎是没有基板的情况下的两倍。获得的结果阐明了由硅纳米球的米氏偶极共振引入的特征，以控制电介质/金属界面系统中的光散射（辐射）和 SPP 激发。获得的结果是开发在标准电信波长范围内工作的新型紧凑型光子和等离子体设备的前景。