论文标题
正/负索引异质结构的延长慢轻型场增强
Extended slow-light field enhancement in positive/negative-index heterostructures
论文作者
论文摘要
我们提出了一个双波导范式，该范式由共同的索引 - 材料pim）/负索引 - 材料（NIM）平板组成，表明了PIM和NIM区域中竞争性的繁殖式处置所引起的超慢光传播。我们首次报告介质扩展电磁（EM）增强覆盖了自由空间波长阶的区域的区域，这是由我们系统中的慢灯模式启用的。我们的动态数值结果与我们开发的理论模型一致，预测EM能量积累让人联想到充电电容器。我们的分析表明，空间压缩并不是在慢灯系统中增强EM的必要条件，并且对高耦合效率，强时间压缩，单一性和模态索引带宽的优点的压力都存在 - 所有这些都存在于我们所提出的范式中。此外，我们表明异质结构波导模式是一个具有独特能量速度的外界实体，与参与者的波导中的poynting载体相反。我们认为，这些结果将激发与集体收获强光相互作用有关的新的慢灯平台。
We present a bi-waveguide paradigm composed of joined Positive-Index-Material PIM)/Negative-Index-Material (NIM) slabs, demonstrating ultra-slow light propagation stemming from the competing propagation disposition in the PIM and NIM regions. We report for the first time a mesoscopic extended electromagnetic (EM) enhancement covering regions of the order of the free space wavelength, enabled by the slow-light mode in our system. Our dynamic numerical results are consistent with our developed theoretical model, predicting an EM energy accumulation reminiscent of a charging capacitor. Our analysis reveals that spatial compression is not a requirement to EM enhancement in slow-light systems and stresses on the merits of high coupling efficiency, strong temporal compression, monomodality and modal index bandwidth, -all present in our proposed paradigm. Furthermore, we show that the heterostructure waveguide mode is an extra-ordinary entity with a unique energy velocity, that is opposite to the Poynting vector in one of the participant waveguides. We believe these results will inspire new slow-light platforms relevant to the collective harvesting of strong light-matter interactions.
