Abstract We theoretically investigate a plasmonic nanostructure, which comprises a groove and aperture-coupled slot resonators integrated on a metal–dielectric–metal (MDM) waveguide. The interference between the mode of the slot resonator and groove give rise to the Fano resonances which can be easily tuned by changing the parameters of the slot. Furthermore, this structure can be extended to generate double Fano resonances by introducing another slot. The calculated wavelength shift between the peak and valley of the Fano line shape is reduced to 10 nm, and the sensitivity and FOM for the structure serving as a nanosensor can reach ∼ 850 nm/RIU and ∼ 14000. Thus, our results reveal that the structures may have great potential for highly integrated circuits, nanosensors and slow-light.

中文翻译：

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基于孔径耦合槽系统引起的尖锐 Fano 共振的等离子体纳米传感器

摘要 我们从理论上研究了等离子体纳米结构，该结构包括集成在金属-电介质-金属 (MDM) 波导上的凹槽和孔径耦合槽谐振器。槽谐振器的模式和凹槽之间的干扰会产生 Fano 谐振，可以通过改变槽的参数轻松调整。此外，可以通过引入另一个槽来扩展这种结构以产生双 Fano 共振。计算出的 Fano 线形峰谷之间的波长偏移减小到 10 nm，作为纳米传感器的结构的灵敏度和 FOM 可以达到 ~ 850 nm/RIU 和 ~ 14000。因此，我们的结果表明结构可能在高度集成电路、纳米传感器和慢光方面具有巨大潜力。