Plasmonic filters and optical directional couplers based on wide metal-insulator-metal structure
Plasmonic filters and optical directional couplers based on wide metal-insulator-metal structure
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DOI：
10.1364/oe.19.007633
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发表时间：
2011-04-11
期刊：
影响因子：
3.8
通讯作者：
Xu, Xingkai
中科院分区：
文献类型：
--
作者：
Chen, Pixin;Liang, Ruisheng;Xu, Xingkai
提出了宽金属-绝缘体-金属(WMIM)结构，并用时域有限差分法(FDTD)对其特性进行了数值分析。仿真结果表明，当功率注入不对称时，功率可以在其两个金属-绝缘体(MI)界面之间周期性地传递。提出了一种新型的基于WMIM结构的等离子体滤光器和光定向耦合器，它们的工作原理类似于传统的介质器件。由于结构简单，没有薄的金属带隙，我们的结果可能为实现纳米级光学器件的制造提供了一种替代方法。(C)2011年美国光学学会
The wide Metal-Insulator-Metal (WMIM) structure is proposed and its characteristics are analyzed numerically using finite-difference time-domain (FDTD) method. Simulations show that power can be periodically transferred between its two Metal-Insulator (MI) interfaces while power is injected asymmetrically. Novel plasmonic filters and optical directional couplers (ODCs) based on WMIM structure are proposed, which work similarly as traditional dielectric devices. Due to the simple structures without thin metal gaps, our result may provide an alternative way to realize the fabrication of nanoscale optical devices. (C) 2011 Optical Society of America