Harvesting light with transformation optics
Harvesting light with transformation optics
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DOI：
10.1007/s11432-013-5031-2
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发表时间：
2013-09
期刊：
影响因子：
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通讯作者：
Yu Luo;R. Zhao;A. Fernández-Domínguez;S. Maier;J. Pendry
中科院分区：
文献类型：
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作者：
Yu Luo;R. Zhao;A. Fernández-Domínguez;S. Maier;J. Pendry
变换光学（TO）是一种控制电磁场的新工具。在超材料技术的背景下，它提供了所需的电磁（EM）现象与其发生所需的材料响应之间的直接联系。最近，这个强大的框架已成功用于研究表面等离子体辅助现象，例如光收集。在这里，我们回顾了基于 TO 的总体策略，以设计能够在宽带光谱上收集光并实现相当大的场限制和增强的等离子体设备。该方法从二维 (2D) 情况开始，例如 2D 金属边缘、新月形圆柱体、纳米线二聚体和粗糙金属表面，并很好地扩展到成熟的三维 (3D) 情况。这种主要的分析方法提供了对所涉及过程的物理见解，并提出了研究各种等离子体纳米结构的方法。
Transformation optics (TO) is a new tool for controlling electromagnetic fields. In the context of metamaterial technology, it provides a direct link between a desired electromagnetic (EM) phenomenon and the material response required for its occurrence. Recently, this powerful framework has been successfully exploited to study surface plasmon assisted phenomena such as light harvesting. Here, we review the general strategy based on TO to design plasmonic devices capable of harvesting light over a broadband spectrum and achieving considerable field confinement and enhancement. The methodology starts with two-dimensional (2D) cases, such as 2D metal edges, crescent-shaped cylinders, nanowire dimers, and rough metal surfaces, and is well extended to fully-fledged three-dimensional (3D) situations. The largely analytic approach gives physical insights into the processes involved and suggests a way forward to study a wide variety of plasmonic nanostructures.