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Graphene-supported tunable near-IR metamaterials

机译:石墨烯支持的可调谐近红外超材料

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By integrating the metallic metamaterials (MMs) with a graphene layer, the resonant properties of an active tunable device based on the metal-SiO2-graphene (MSiO(2)G) structure have been theoretically investigated in the near-IR spectral region. The results manifest that the influences of the graphene layer on the propagation properties are significant. Owing to the tunability of the Fermi level of graphene, the resonance of transmitted or reflected curves can be tuned in a wide range (160-193 THz). To an original metal unit cell structure, an elevated Fermi level of graphene layer enhances the resonance dips and shifts it to the higher frequency. Compared with the original structure, the corresponding complementary MMs structure shows a much sharper spectral curve and can be used to fabricate a switcher or filters. The results are very helpful for designing graphene plasmonic devices. (C) 2015 Optical Society of America
机译:通过将金属超材料(MMs)与石墨烯层集成在一起,已在近红外光谱区域中对基于金属SiO2-石墨烯(MSiO(2)G)结构的有源可调器件的谐振特性进行了理论研究。结果表明,石墨烯层对传播性能的影响是显着的。由于石墨烯费米能级的可调性,可以在很宽的范围内(160-193 THz)调节透射或反射曲线的共振。对于原始的金属晶胞结构,较高的石墨烯层费米能级会增强共振峰,并将其转移到更高的频率。与原始结构相比,相应的互补MM结构显示出更陡峭的光谱曲线,可用于制造切换器或滤波器。该结果对于设计石墨烯等离激元器件非常有帮助。 (C)2015年美国眼镜学会

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