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Theoretical and experimental analyze of plasmonic resonances in infrared metamaterials under normal to plane incidence

机译:垂直于平面入射的红外超材料中等离子体共振的理论和实验分析

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Metamaterials have attracted much interest since their realization by Smith et al. [2]. A few research teams all other the world are making them a reality in the infrared and optical regime. Following the theoretical study of C. Rockstuhl et al. [4], we have fabricated various metamaterial structures derived from the combination of SRR (Split Ring Resonators) and nano-continuous wires by diminishing the size of the legs of the SRR perpendicular to the gap. This geometrical transformation shown in the SEM (scanning electron microscope) pictures of figure 1 allows an experimental understanding of the origin of resonances in metamaterials under normal incidence. The fabrication was performed by e-beam lithography, gold on silicon. Simulations were performed using a Drude model of the electromagnetic permittivity of gold. Both measurement and simulation results lead to an accurate analyze of the plasmonic resonances of the metamaterial and open the way to their control in infrared metamaterials under normal to plane propagation.
机译:自从Smith等人意识到超材料以来,超材料就引起了人们的极大兴趣。 [2]。世界各地的一些研究小组正在使它们在红外和光学领域成为现实。根据C. Rockstuhl等人的理论研究。 [4],我们通过减小垂直于间隙的SRR支脚的尺寸,制造出了由SRR(裂环谐振器)和纳米连续线的组合衍生而来的各种超材料结构。在图1的SEM(扫描电子显微镜)图片中显示的这种几何变换可以通过实验了解法向入射下超材料的共振起源。通过在硅上金的电子束光刻来执行制造。使用金的电磁电容的Drude模型进行了模拟。测量和仿真结果都可以对超材料的等离子体共振进行准确的分析,并为在垂直于平面传播的红外超材料中控制超材料开辟了道路。

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