超材料
太赫兹辐射
极化(电化学)
透射率
宽带
电磁辐射
材料科学
光电子学
偏振旋转器
光子超材料
线极化
正交偏振光谱成像
光子学
物理
光学
化学
物理化学
激光器
双折射
作者
Longqing Cong,Wei Cao,Xueqian Zhang,Zhen Tian,Jianqiang Gu,Ranjan Singh,Jiaguang Han,Weili Zhang
摘要
Polarization conveys valuable information for electromagnetic signal processing exhibiting tremendous potential in developing application driven photonic devices. Manipulation of polarization state of an electromagnetic wave has drawn a lot of research interests in many different fields, especially in the terahertz regime. Here, we propose a unique approach to efficiently rotate the linear polarization of terahertz wave in a broadband configuration with tri-layer metasurfaces. We experimentally observe a nearly perfect orthogonal polarization conversion with an ultrahigh efficiency, demonstrating a ultrathin terahetz rotator. The Fabry-Perot cavity effect in the tri-layer metasurfaces is attributed to the underlying mechanism of high transmittance and polarization rotation.
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