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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >Tunable dual-frequency cross polarization converters based on graphene metasurface in infrared range
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Tunable dual-frequency cross polarization converters based on graphene metasurface in infrared range

机译：基于石墨烯元曲面在红外范围内的可调双频交叉偏振器

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摘要

A tunable dual-frequency metamaterial graphene polarization converter in the infrared range is put forward in this paper. The proposed converter is made up of 3 layers-the bottom gold layer, the middle silicon dioxide layer and the upper graphene layer. The simulated results show that the polarization converter can simultaneously work at two resonant frequencies of 36.82 and 41.38 THz. The polarization conversion rates are up to 0.9992 at 36.82 THz and 0.9969 at 41.38 THz under the certain normal condition when Fermi energy is given to 1.0 eV, showing the high efficiency of the polarization converter. Moreover, the converter shows its stable working performance under the change of the incident angle and the geometrical size. Meanwhile, without varying the nanostructure, the resonant frequencies can be flexibly adjusted by controlling the Fermi energy. The superior performance of the proposed graphene polarization converter indicates a broad prospect that a large number of applications such as infrared imaging sensors, modulators, switches, photonic and biochemical sensors, light harvesting, thermal detection and electromagnetic energy converter will apply it.
机译：本文提出了一种可调谐的双频石墨石墨烯极化转换器。所提出的转换器由3层 - 底金层，中间二氧化硅层和上石墨烯层组成。模拟结果表明，偏振转换器可以在36.82和41.38 ZZ的两个共振频率下同时工作。当FERMI能量给出1.0eV时，极化转换率在36.82六号和0.9969处，在41.38至4969周下，0.9969，显示为1.0 eV，显示极化转换器的高效率。此外，转换器在入射角和几何尺寸的变化下显示其稳定的工作性能。同时，在不改变纳米结构的情况下，可以通过控制费米能量灵活地调整谐振频率。所提出的石墨烯偏振变换器的卓越性能表示广泛的应用，即红外成像传感器，调制器，开关，光子和生化传感器，光收集，热检测和电磁能量转换器等大量应用。

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