Effect of graphene on far-infrared transmission and absorption of FeF<ce:inf loc='post'>2</ce:inf> photonic crystals

Ying Gao; Sheng Zhou; Shufang Fu

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Effect of graphene on far-infrared transmission and absorption of FeF2 photonic crystals

机译：石墨烯对FEF的远红外传动和吸收的影响 2 光子晶体

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Abstract

The influence of graphene (Gr) on the far-infrared transmission and absorption of FeF2 photonic crystals (PCs) is investigated by the forth-order transfer matrix since Gr is anisotropic when the external field is perpendicular to the surface of PCs. The numerical results show that the transmission and absorption spectra largely depend on the structural symmetry of Gr/FeF2 PCs and the position of Gr layer. The optimal structure and number of dielectric bi-layers (N) are discussed. In addition, the introduction of Gr leads to the disappearance of the defect modes in the band gap. Meanwhile, the line width of absorption around of the resonant frequencies of FeF2 has been extremely broadened, which is compared with the one of FeF2 PCs. Once N is beyond a critical value, the absorber will become the reflector. The effect of Fermi energy and external field on the absorption is also investigated.

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石墨烯（GR）对FEF的远红外传输和吸收的影响 2 光子晶体（PCS）由起至转移矩阵研究，因为当外部场垂直于PC的表面时GR是各向异性的。数值结果表明，传输和吸收光谱很大程度上取决于GR / FEF 2 PC和GR层的位置的结构对称性。讨论了介电双层的最佳结构和数量（ n ）。此外，引入GR导致带隙中缺陷模式的消失。同时，围绕FEF的谐振频率的吸收线宽 2 已经非常拓宽，这与FEF 2 PC。一旦 n 超出临界值，吸收器将成为反射器。还研究了FERMI能量和外部场对吸收的影响。 ]]>

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《Physica, B. Condensed Matter》 |2017年第2017期|共7页
作者
Ying Gao; Sheng Zhou; Shufang Fu;
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作者单位

Key Laboratory for Photonic and Electronic Bandgap Materials Ministry of Education School of Physics and Electronic Engineering Harbin Normal University;

Key Laboratory for Photonic and Electronic Bandgap Materials Ministry of Education School of Physics and Electronic Engineering Harbin Normal University;

Key Laboratory for Photonic and Electronic Bandgap Materials Ministry of Education School of Physics and Electronic Engineering Harbin Normal University;

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正文语种 eng
中图分类物理学;
关键词
Graphene; Terahertz; Antiferromagnetic material; Transmission; Absorption; Defect modes;

机译：石墨烯;太赫兹;反铁磁材料;传动;吸收;缺陷模式;

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Effect of graphene on far-infrared transmission and absorption of FeF2 photonic crystals

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