论文标题
拓扑边缘模式锥度
Topological Edge Mode Tapering
论文作者
论文摘要
模式逐渐变细或某种模式大小的逐渐操纵是任何旨在有效接口两个不同模式大小的子系统的系统的要求。尽管已经证明了高效率龙头，但它们通常以大型设备足迹或具有挑战性的制造为代价。拓扑光子学为某些类型的疾病和手性提供了鲁棒性，事实证明，这是近年来多种应用的非常适合的设计原理。在这里，我们提出了一种通过拓扑带隙工程实现的一种新型模式锥度。我们从数值上证明了模式宽度的六倍变化在极度紧凑的8 $ $ m距离上，并且在光学域中几乎统一效率。通过被抑制的反向散射并且没有对高阶模式的激发，这种锥度可以在经典和量子光学器件中开发可扩展的多组分系统的开发方面取得新的进展。
Mode tapering, or the gradual manipulation of the size of some mode, is a requirement for any system that aims to efficiently interface two or more subsystems of different mode sizes. While high efficiency tapers have been demonstrated, they often come at the cost of a large device footprint or challenging fabrication. Topological photonics, offering robustness to certain types of disorder as well as chirality, has proved to be a well-suited design principle for numerous applications in recent years. Here we present a new kind of mode taper realized through topological bandgap engineering. We numerically demonstrate a sixfold change in mode width over an extremely compact 8$μ$m distance with near unity efficiency in the optical domain. With suppressed backscattering and no excitation of higher-order modes, such a taper could enable new progress in the development of scalable, multi-component systems in classical and quantum optics.
