Qiu Rong, Lin Hang, Huang Jing, Liang Cuiping, Yi Zao
Joint Laboratory for Extreme Conditions Matter Properties, Southwest University of Science and Technology, Mianyang 621010, China.
Sichuan Civil-Military Integration Institute, SCII, Mianyang 621010, China.
Materials (Basel). 2018 Sep 1;11(9):1576. doi: 10.3390/ma11091576.
We theoretically research the characteristics of tunable multipolar Fano resonances in novel-designed Au ring-disk plasmonic nanostructures. We systematically study some structural parameters that influence the multipolar Fano resonances of the nanostructures. Adjustment of the radius (R₁ and R₂) of the Au ring, the radius (R₃) of the Au disk and the thickness (H) of the Au ring-disk can effectively adjust the multipolar Fano resonances. The complex field distributions excited by a Au ring-disk can produce dark resonance modes. At the frequency of the multipolar Fano resonances, strong localized field distributions can be obtained. The Fano resonances exhibit strong light-extinction properties in Au ring-disk nanostructures, which can be applied to an optical tunable filter and optical switch.
我们从理论上研究了新型设计的金环盘等离子体纳米结构中可调谐多极法诺共振的特性。我们系统地研究了一些影响纳米结构多极法诺共振的结构参数。调整金环的半径（R₁和R₂）、金盘的半径（R₃）以及金环盘的厚度（H）可以有效地调整多极法诺共振。金环盘激发的复场分布可以产生暗共振模式。在多极法诺共振频率处，可以获得强烈的局域场分布。法诺共振在金环盘纳米结构中表现出强光消光特性，可应用于光学可调滤波器和光开关。
