Surface plasmon polariton propagation in nanoscale metal gap waveguides.
Surface plasmon polariton propagation in nanoscale metal gap waveguides.
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DOI：
10.1364/ol.29.001992
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发表时间：
2004-09
期刊：
影响因子：
3.6
通讯作者：
B. Wang;Guo Ping Wang
中科院分区：
文献类型：
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作者：
B. Wang;Guo Ping Wang
基于对纳米间隙宽度金属间隙波导（MGW）光路中表面等离子体激元（SPP）传播特性的有限差分时域模拟，我们从理论上证明了由分裂和重组MGW和耦合MGW组成的两种结构可以用作纳米级马赫-曾德尔干涉仪。 MGW 阵列显示出阵列成像和控制 SPP 流量的功能。耦合 MGW 的其他潜在应用，如 SPP 开关、定向耦合器，甚至作为观察电磁场线性和非线性动态行为的纳米级对应物，也进行了预测和讨论。我们的结果指出了一种有趣的方法来操纵光信号并在纳米光子结构中提供有效的传感。
Based on finite-difference time-domain simulation of the propagation characteristics of surface plasmon polaritons (SPPs) in optical circuits made from metal gap waveguides (MGWs) with nanometric gap widths, we theoretically demonstrate that two structures that consist of splitting and recombining MGWs and of coupling MGWs can be used as nanoscale Mach-Zehnder interferometers. MGW arrays show capabilities for array imaging and for controlling the flow of SPPs. Other potential applications of coupling MGWs, as SPP switches, directional couplers, and even as a nanoscale counterpart for observing linear and nonlinear dynamic behavior of electromagnetic fields, are also predicted and discussed. Our results point to an interesting way to manipulate optical signals and provide efficient sensing in nanophotonic architectures.