内嵌银纳米棒圆形银缝隙结构中的法诺共振现象

Fano resonance in sliver circular gap embedded with a sliver nanorod

应用时域有限差分算法系统地研究了内嵌银纳米棒圆形银缝隙结构的透射特性.由于倾斜银纳米棒破坏了圆形腔原有的对称稳态磁场分布,该系统中产生了法诺共振现象.此外,透射光谱强烈地依赖于纳米棒的倾斜角度和纳米棒的形貌参数.这些结果有助于设计复合结构滤波器,满足特定的滤波需要.

The transmittance property and steady-state magnetic field distribution of the sliver circular gap embedded with a sliver nanorod are investigated using the finite-difference time-domain method. Since the titled nanorod breaks the symmetric steady-state magnetic field distribution, Fano resonance occurs in the composite system. In addition, the transmittance spectrum depends strongly on the tilting angle and topologic shape of the nanorod. These results would be useful for designing filter for specific usage.