Rosenblatt Gilad, Orenstein Meir
Department of Electrical Engineering, Technion, Haifa 32000, Israel.
Opt Express. 2011 Oct 10;19(21):20372-85. doi: 10.1364/OE.19.020372.
Layered medium comprised of metal-dielectrics constituents is of much interest in the field of metamaterials. Here we introduce a novel analysis approach based on competing coupled structures of plasmonic gaps (MIM) and slabs (IMI) for the detailed comprehension of the band structure of periodic metal-dielectric stacks. This approach enables the rigorous identification of many interesting features including the intersections between plasmonic bands, flat or negative band formation, and the field symmetry of the propagating modes. Furthermore - the "gap-slab competition" concept allows us to develop design tools for incorporating desired dispersion properties of both gap and slab modes into the stack's band structure, as well as effects of finite stack termination.
由金属-电介质成分组成的分层介质在超材料领域备受关注。在此，我们引入一种基于等离子体间隙（MIM）和平板（IMI）竞争耦合结构的新颖分析方法，以详细理解周期性金属-电介质堆叠的能带结构。这种方法能够严格识别许多有趣的特征，包括等离子体能带之间的交点、平坦或负能带的形成以及传播模式的场对称性。此外，“间隙-平板竞争”概念使我们能够开发设计工具，将间隙和平板模式的所需色散特性纳入堆叠的能带结构，以及有限堆叠终端的影响。
