This article presents an efficient electromagnetic (EM) characterization technique to extract the permeability and permittivity tensors of multilayer graphene-plasma formations. This method uses the scattering parameters of normally incident circularly polarized plane waves in free space, making use of the circular polarization to deal with the discontinuity ambiguities in the extracted tensorial permeabilities and permittivities. The proposed method directly determines the linear permeability and permittivity tensors from the combined parameters that are deduced from the circularly polarized wave components. This simple procedure succeeds in overcoming the limitation to usable terahertz and optical frequency bands suffered by existing extraction techniques for lossy and lossless anisotropic material behavior. The retrieved graphene-plasma tensor elements are validated by means of comparison with analytical parameters obtained by solving the original EM problem using the transfer matrix method extended for the circularly polarized fields.

中文翻译：

---

石墨烯等离子体地层的电磁特性

本文提出了一种有效的电磁 (EM) 表征技术，用于提取多层石墨烯-等离子体地层的磁导率和介电常数张量。该方法利用自由空间中法向入射圆极化平面波的散射参数，利用圆极化处理提取的张量磁导率和介电常数中的不连续性模糊性。所提出的方法直接根据从圆极化波分量推导出的组合参数确定线性磁导率和介电常数张量。这个简单的过程成功地克服了现有的有损和无损各向异性材料行为提取技术对可用太赫兹和光频带的限制。