软边界石墨烯纳米带表面等离子激元及其作为压控等离子开关和频率解复用器的应用
Surface plasmon polaritons on soft-boundary graphene nanoribbons and their application as voltage controlled plasmonic switches and frequency demultiplexers
摘要：
石墨烯片门与脊状接地平面，创建一个软边界（SB）石墨烯纳米，被认为是。通过调整脊参数和偏压，可以在石墨烯上创建可以引导TM表面等离子体激元（SPP）的通道。发现了两种模式：基本模式和高阶模式，没有明显的截止频率，能量分布在整个通道上;边缘模式，能量集中在软边界边缘。这些模式的色散曲线，电近场图案，和电流分布的确定。由于能量集中在边缘模式的位置可以很容易地通过偏置电压和频率进行电子控制，边缘模式现象被用来提出一种新的电压控制等离子体激元开关和等离子体激元频率解复用器。
英文摘要：
A graphene sheet gated with a ridged ground plane, creating a soft-boundary (SB) graphene nanoribbon, is considered. By adjusting the ridge parameters and bias voltage a channel can be created on the graphene which can guide TM surface plasmon polaritons (SPP). Two types of modes are found; fundemental and higher-order modes with no apparent cutoff frequency and with energy distributed over the created channel, and edge modes with energy concen-trated at the soft-boundary edge. Dispersion curves, electric near-field patterns, and current distributions of these modes are determined. Since the location where energy is concentrated in the edge modes can be easily controlled electronically by the bias voltage and frequency, the edge-mode phenomena is used to propose a novel voltage controlled plasmonic switch and a plasmonic frequency demultiplexer.
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