论文标题
宽带可调的Terahertz极化转换器基于石墨烯形元面
Broadband Tunable Terahertz Polarization Converter based on Graphene-shaped Metasurfaces
论文作者
论文摘要
在本文中，提出了基于石墨烯元面的宽带可调极化转换器。该极化转换器使用石墨烯特性的优势在Terahertz（THZ）频率区域中起作用，具有可调频率响应。底物顶部设计的石墨烯形周期结构用于将入射波极化转换为THZ频率的柔性操作带中所需的目标。在THZ频段中，极化转化率从4.86至8.42 THz（分数带宽为54％）的偏振转换率超过0.85。所提出的极化转换器对入射波的角度不敏感到40°。使用石墨烯提供了可调频率响应，而无需更改设计结构的几何形状。
In this paper, a broadband tunable polarization converter based on graphene metasurfaces is proposed. This polarization converter works in the terahertz (THz) frequency region, using the advantage of graphene characteristics to have a tunable frequency response. The designed graphene-shaped periodic structure on top of the substrate is utilized to convert the incident wave polarization to the desired target in a flexible operational band in the THz frequencies. The polarization conversion ratio is more than 0.85 in a wide range of frequencies in the THz band from 4.86 to 8.42 THz (the fractional bandwidth is 54%). The proposed polarization converter is insensitive to the angle of the incident wave up to 40°. Using graphene provides a tunable frequency response without changing the geometry of the designed structure.
