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Analytic model of plasmonic coupling: Surface relief gratings

机译:等离子体耦合分析模型:表面起伏光栅

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摘要

We develop an analytic model to describe the coupling of light to surface plasmon polaritons by surface relief gratings. Plasmonic coupling efficiencies over 0.8 are predicted to within 15%, while the corresponding computational times are more than 2 orders of magnitude shorter than needed in standard numerical approaches. In addition, we are able both to provide simple equations for the physically significant constants of this problem, such as the coupling strength and reradiation terms, and to predict the spatial dynamics of the plasmonic and reflected fields.
机译:我们建立了一个解析模型来描述表面起伏光栅将光耦合到表面等离激元极化子上。预计等离子耦合效率超过0.8,将在15%以内,而相应的计算时间比标准数值方法所需的计算时间短2个数量级。此外,我们既可以为该问题的物理上重要的常数提供简单的方程式,例如耦合强度和辐射项,又可以预测等离子体场和反射场的空间动力学。

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