论文标题
时间切换以扩展薄吸收器的带宽
Temporal Switching to Extend the Bandwidth of Thin Absorbers
论文作者
论文摘要
时间不变，被动薄膜的波吸收在根本上受到带宽和整体厚度之间的权衡的限制。在这项工作中，我们研究了时间切换的使用，以减少较宽的带宽薄层平板的信号反射。我们将准正常模式理论扩展到时间切换，开发一种从头开始的形式主义，可以建模广泛的时间切换结构。我们的形式主义提供了最佳的切换策略，以最大程度地提高最低段反射的带宽，从而显示了有希望的时间切换的纳米光子和超材料系统的前景，以克服时间不变，被动结构的限制。
Wave absorption in time-invariant, passive thin films is fundamentally limited by a trade-off between bandwidth and overall thickness. In this work, we investigate the use of temporal switching to reduce signal reflections from a thin grounded slab over broader bandwidths. We extend quasi-normal mode theory to time switching, developing an ab initio formalism that can model a broad class of time-switched structures. Our formalism provides optimal switching strategies to maximize the bandwidth over which minimal reflection is achieved, showing promising prospects for time-switched nanophotonic and metamaterial systems to overcome the limits of time-invariant, passive structures.
