Nanophotonics and Metrology Laboratory, Swiss Federal Institute of Technology (EPFL), CH-1015 Lausanne.
ACS Nano. 2011 Nov 22;5(11):8999-9008. doi: 10.1021/nn203173r. Epub 2011 Nov 3.
The optical properties of plasmonic nanostructures supporting Fano resonances are investigated with an electromagnetic theory. Contrary to the original work of Fano, this theory includes losses in the materials composing the system. As a result, a more general formula is obtained for the response of the system and general conclusions for the determination of the resonance parameters are drawn. These predictions are verified with surface integral numerical calculations in a broad variety of plasmonic nanostructures including dolmens, oligomers, and gratings. This work presents a robust and consistent analysis of plasmonic Fano resonances and enables the control of their line shape based on Maxwell's equations. The insights into the physical understanding of Fano resonances gained this way will be of great interest for the design of plasmonic systems with specific spectral responses for applications such as sensing and optical metamaterials.
本文运用电磁理论研究了支持 Fano 共振的等离子体纳米结构的光学性质。与 Fano 的原始工作相反，该理论包括组成系统的材料的损耗。因此，得到了系统响应的更一般公式，并得出了确定共振参数的一般结论。这些预测通过在各种等离子体纳米结构（包括石墓、低聚物和光栅）中的表面积分数值计算得到验证。这项工作对等离子体 Fano 共振进行了稳健而一致的分析，并使基于麦克斯韦方程组控制其线型成为可能。通过这种方式对 Fano 共振物理理解的深入了解将极大地促进具有特定光谱响应的等离子体系统的设计，例如用于传感和光学超材料等应用。
