标题： 超后向散射纳米粒子二聚体 显示英文标题

标题： Superbackscattering Nanoparticle Dimers

摘要： 超后向散射纳米粒子二聚体的理论和设计被提出。 我们分析推导了其最优配置和后向散射截面的上限。 特别是，证明了电小尺寸的纳米粒子二聚体相对于单极子粒子可以将后向散射增强6.25倍。 我们证明，通过使用简单的电路模型可以找到接近这一理论极限的最优设计。 基于等离子体和高介电常数粒子的实际实现研究显示，即使考虑实际损耗，四倍增强因子也可能是可实现的。 显示英文摘要

摘要： The theory and design of superbackscattering nanoparticle dimers are presented. We analytically derive the optimal configurations and the upper bound of their backscattering cross-sections. In particular, it is demonstrated that electrically small nanoparticle dimers can enhance the backscattering by a factor of 6.25 with respect to single dipolar particles. We demonstrate that optimal designs approaching this theoretical limit can be found by using a simple circuit model. The study of practical implementations based on plasmonic and high-permittivity particles reveal that fourfold enhancement factors might be attainable even with realistic losses.