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Nonlocal effective medium analysis in symmetric metal-dielectric multilayer metamaterials

机译:对称金属介电多层超材料中的非局部有效介质分析

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摘要

The optical nonlocality in symmetric metal-dielectric multilayer metamaterials is theoretically and experimentally investigated with respect to transverse-magnetic-polarized incident light. A nonlocal effective medium theory is derived from the transfer-matrix method to determine the nonlocal effective permittivity depending on both the frequency and wave vector in a symmetric metal-dielectric multilayer stack. In contrast to the local effective medium theory, our proposed nonlocal effective medium theory can accurately predict measured incident angle-dependent reflection spectra from a fabricated multilayer stack and provide nonlocal dispersion relations. Moreover, the bulk plasmon polaritons with large wave vectors supported in the multilayer stack are also investigated with the nonlocal effective medium theory through the analysis of the dispersion relation and eigenmode.
机译:关于横向磁偏振入射光,在理论和实验上研究了对称金属介电多层超材料中的光学非局部性。一种非局部有效介质理论是从传递矩阵方法中得出的,该方法根据对称金属-电介质多层堆叠中的频率和波矢确定非局部有效介电常数。与局部有效介质理论相反,我们提出的非局部有效介质理论可以准确地预测来自制造的多层堆叠的测得的入射角相关反射光谱,并提供非局部色散关系。此外,还通过非色散有效介质理论,通过对色散关系和本征模的分析,研究了在多层堆叠中具有大波矢的体等离激元极化子。

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