论文标题
用于自发排放增强的几层双曲线多层
Few-layer hyperbolic multilayer for spontaneous emission enhancement
论文作者
论文摘要
由金属和介电层组成的多层超材超材料在自发发射增强中具有重要的应用。与传统的多层结构中至少数十个层的常规选择相反，我们的数值计算表明，具有较少层和较薄层的多层在purcell效应方面的表现将胜过较少层和较薄的层。这些发现归因于对反射系数的假想部分的增加层数的负贡献，以及在较薄的金属层上表面等离子体极化模式之间的较强耦合。这项工作可以提供基本的见解和实用指南，以优化超薄甚至二维光子源的光态增强功能的局部密度。
Multilayer hyperbolic metamaterials consisting of alternating metal and dielectric layers have important applications in spontaneous emission enhancement. In contrast to the conventional choice of at least dozens of layers in multilayer structures to achieve tunable Purcell effect on quantum emitters, our numerical calculations reveal that multilayers with fewer layers and thinner layers would outperform in Purcell effect. These discoveries are attributed to the negative contributions by an increasing layer number to the imaginary part of the reflection coefficient, and the stronger coupling between surface plasmon polariton modes on a thinner metal layer. This work could provide fundamental insights and practical guide for optimizing the local density of optical states enhancement functionality of ultrathin and even two-dimensional photon sources.
