THz polarization conversion metamaterial based on bianisotropic response of split-ring resonators
THz polarization conversion metamaterial based on bianisotropic response of split-ring resonators
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基于裂环谐振器双各向异性响应的太赫兹偏振转换超材料
DOI：
10.1088/1361-6463/ab8c02
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发表时间：
2020-06
期刊：
影响因子：
--
通讯作者：
Ji Zhou
中科院分区：
文献类型：
--
作者：
Tian Yang;Xiaoming Liu;Haohua Li;Chen Wang;Jingbo Sun;Ji Zhou
提出了一种基于开口环谐振器（SRR）超材料双各向异性响应的偏振转换机制。结果表明，在太赫兹波斜入射条件下，入射波的磁场分量可以激发SRR的LC共振，形成垂直于SRR间隙的电偶极子，辐射出正交的电场，从而产生极化转换.数值模拟和实验验证了这一思想，结果是非常一致的。这项研究有助于我们了解SRR的双各向异性电磁响应，并为使用双各向异性超材料在THz或其他频率下创建高效、低损耗的偏振转换器件开辟了新的机会。
In this paper, we propose a novel polarization conversion mechanism based on bianisotropic response of split ring resonator (SRR) metamaterial. It is found that under oblique incidence condition with the incident terahertz electric field parallel to the SRR gap, the magnetic field component of the incident wave can excite the fundamental LC resonance of SRR and form an electric dipole perpendicular to the SRR gap, which radiates orthogonal electric field thus resulting in polarization conversion. Numerical simulations and experiments are performed to verify this idea and the results are in excellent agreement. This study contributes to our understanding of the bianisotropic electromagnetic response of SRR and opens new opportunities for creating high-efficiency and low-loss polarization conversion devices in THz or other frequencies using bianisotropic metamaterials.
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