论文标题
通过位移电流密度的通量保护来增强高指数谐振器中的电场
Enhancing Electric Fields in High-Index Resonators by Flux Conservation of the Displacement Current Density
论文作者
论文摘要
次波长空间区域内的浓缩光是纳米光子学的核心主题。在这封信中，我们基于位移电流密度的通量保护，介绍了高索引谐振器中亚波长的定位和增强电场的一般原理。我们通过局部挤压其部分将该设计规则应用于环谐振器：由于通量是保守的，因此必须增强电场以补偿截面区域的减少。引入的原理可能构成控制纳米级位移电流密度的重要步骤，指导拓扑设计和复杂介电结构的几何形状。
Concentrating light within subwavelength spatial regions is a central topic in nanophotonics. In this letter, we introduce a general principle for the subwavelength localization and enhancement of electric fields in high-index resonators, based on the flux conservation of the displacement current density. We apply this design rule to a ring resonator by locally squeezing its section: since the flux is conserved, the electric field is necessarily enhanced to compensate the reduction of the section area. The introduced principle may constitute an important step toward the control of the displacement current density at the nanoscale, guiding the design of the topology and the geometry of complex dielectric structures.
