Nonlinear optical model for strip plasmonic waveguides
Nonlinear optical model for strip plasmonic waveguides
复制标题
带状等离子体波导的非线性光学模型
DOI：
10.1364/josab.33.001341
复制
发表时间：
2016
影响因子：
1.9
通讯作者：
A. Lavrinenko
中科院分区：
文献类型：
--
作者：
O. Lysenko;M. Bache;A. Lavrinenko
本文提出了一种条形等离子体波导非线性光学特性的理论模型。我们研究的特定波导几何形状包含金芯、粘附层和二氧化硅包覆层。结果表明，金芯的三阶极化率显着依赖于层的厚度，并具有主导贡献的有效三阶极化率的长程等离子体激元模式。这在等离子体波导中产生了两种非线性光学效应，我们在[Opt. Lett.41，317（2016）OPLEDP 0146 -959210.1364/OL.41.000317]中实验观察到并报告了这两种非线性光学效应。第一种效应是等离子体激元模式的非线性功率饱和，第二种效应是等离子体激元模式的光谱展宽。这两种非线性等离子体效应都可以用于实际应用，它们的适当模型对于通信方法的进一步发展将是重要的。
This paper presents a theoretical model of nonlinear optical properties for strip plasmonic waveguides. The particular waveguides geometry that we investigate contains a gold core, adhesion layers, and silicon dioxide cladding. It is shown that the third-order susceptibility of the gold core significantly depends on the layer thickness and has the dominant contribution to the effective third-order susceptibility of the long-range plasmon polariton mode. This results in two nonlinear optical effects in plasmonic waveguides, which we experimentally observed and reported in [Opt. Lett.41, 317 (2016)OPLEDP0146-959210.1364/OL.41.000317]. The first effect is the nonlinear power saturation of the plasmonic mode, and the second effect is the spectral broadening of the plasmonic mode. Both nonlinear plasmonic effects can be used for practical applications and their appropriate model will be important for further developments in communication approaches.