硅纳米球结构的多极优化聚焦研究
Multipole optimization of light focusing by silicon nanosphere structures
AI总结：
本研究通过多极优化方法设计硅纳米球金属透镜，实现精确光聚焦，展示了高效优化方案在超薄金属透镜工程中的应用潜力。
摘要：
我们研究了耦合多极模型及其在零阶Born近似框架下用于建模由有限尺寸硅纳米球结构实现的光聚焦的适用性，支持电和磁偶极子和四极子共振。基于解析近似的结果通过与T矩阵方法进行的数值模拟进行验证。利用进化算法优化，我们将所发展的方法应用于设计具有预定义聚焦特性的硅纳米球金属透镜。获得的结果表明，所提出的计算方案在工程超薄金属透镜方面具有强大的优化潜力。
英文摘要：
We investigate the applicability of the coupled multipole model and its modification in the framework of the zero-order Born approximation for modeling of light focusing by finite-size nanostructures of silicon nanospheres, supporting electric and magnetic dipole and quadrupole resonances. The results based on the analytical approximations are verified by comparison with the numerical simulations performed by the T-matrix method. Using the evolutionary algorithm optimization, we apply the developed approach to design the silicon nanosphere metalenses with predefined focusing properties. The obtained results demonstrate a strong optimization potential of the suggested calculation scheme for engineering ultra-thin metalenses.
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