激光与光电子学进展, 2015, 52 (6): 062401, 网络出版: 2015-06-03
等离子体八聚体中多重法诺共振现象的研究 
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Research of Mutiple Fano Resonances in Plasmonic Octamer Clusters
表面光学 表面等离激元共振 法诺共振 时域有限差分法 optics at surface surface plasmon resonance Fano resonances finite-difference time-domain method
摘要
利用时域有限差分法(FDTD)研究了纳米环八聚体和劈裂纳米环八聚体的消光光谱及其近场分布。研究结果表明，当入射光偏振方向不同时，纳米环八聚体和劈裂纳米环八聚体都产生法诺共振现象，通过调整八聚体外部4 个纳米环间夹角的大小，不仅可以使纳米环八聚体和劈裂纳米环八聚体产生多重法诺共振，还可以对法诺共振的调制深度及共振波长进行调谐,以满足在表面增强拉曼散射、生物分子或化学分子探测中的应用。
Abstract
The extinction spectra and distribution of electric near field of the octamer clusters composed of nanorings and split nanorings are calculated by using the finite-difference time-domain method (FDTD). The results show that the Fano resonances are generated in the plasmonic octamer clusters composed of nanorings and split nanorings with different incident light polarizations. In addition, multiple Fano resonances can be generated and the modulation depth and resonance wavelength of Fano resonances can be tuned by adjusting the angle of the external ring of the plasmonic octamer clusters. These results can be used in Raman scattering, biological and chemical molecule detection.
黄运欢, 薛保平. 等离子体八聚体中多重法诺共振现象的研究[J]. 激光与光电子学进展, 2015, 52(6): 062401. Huang Yunhuan, Xue Baoping. Research of Mutiple Fano Resonances in Plasmonic Octamer Clusters[J]. Laser & Optoelectronics Progress, 2015, 52(6): 062401.
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