Impedance generalization for plasmonic waveguides beyond the lumped circuit model
Impedance generalization for plasmonic waveguides beyond the lumped circuit model
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DOI：
10.1103/physrevb.88.035117
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发表时间：
2013-07-16
影响因子：
3.7
通讯作者：
Rockstuhl, Carsten
中科院分区：
文献类型：
--
作者：
Kaiser, Thomas;Bin Hasan, Shakeeb;Rockstuhl, Carsten
基于两个光子结构之间的电磁相互作用，我们解析地推导出了它们之间相对阻抗比的严格表达式。我们的方法概括了阻抗的物理意义，以测量基于互易性的本征模重叠。与已知的情况下，在射频和光学域的一致性。分析揭示了简单的电路参数的适用性结束，以及如何可以解释超出这一点的阻抗。我们说明了我们的方法，成功地描述了一个布拉格反射器，终止绝缘体-金属-绝缘体等离子体激元波导在近红外我们的阻抗概念。
We analytically derive a rigorous expression for the relative impedance ratio between two photonic structures based on their electromagnetic interaction. Our approach generalizes the physical meaning of the impedance to a measure for the reciprocity-based overlap of eigenmodes. The consistency with known cases in the radio-frequency and optical domain is shown. The analysis reveals where the applicability of simple circuit parameters ends and how the impedance can be interpreted beyond this point. We illustrate our approach by successfully describing a Bragg reflector that terminates an insulator-metal-insulator plasmonic waveguide in the near infrared by our impedance concept.