Wang Hongqing, Yang Junbo, Zhang Jingjing, Huang Jie, Wu Wenjun, Chen Dingbo, Xiao Gongli
Opt Lett. 2016 Mar 15;41(6):1233-6. doi: 10.1364/OL.41.001233.
A nanometeric plasmonic filter with a symmetrical multiple-teeth-shaped structure is investigated theoretically and numerically. A tunable wide bandgap is achievable by adjusting the depth and number of teeth. This phenomenon can be attributed to the interference superposition of the reflected and transmitted waves from each tooth. Moreover, the effects of varying the number of identical teeth are also discussed. It is found that the bandgap width increases continuously with the increasing number of teeth. The finite difference time domain method is used to simulate and compute the coupling of surface plasmon polariton waves with different structures in this Letter. The plasmonic waveguide filter that we propose here may have meaningful applications in ultra-fine spectrum analysis and high-density nanoplasmonic integration circuits.
对一种具有对称多齿形结构的纳米等离子体滤波器进行了理论和数值研究。通过调整齿的深度和数量可实现可调谐宽带隙。这种现象可归因于来自每个齿的反射波和透射波的干涉叠加。此外，还讨论了改变相同齿数量的影响。发现带隙宽度随着齿数量的增加而连续增加。在本文中采用时域有限差分法来模拟和计算表面等离激元极化子波与不同结构的耦合。我们在此提出的等离子体波导滤波器可能在超精细光谱分析和高密度纳米等离子体集成电路中具有有意义的应用。
