School of Information and Communication, Guilin University of Electronic Technology, Guilin, 541004, China.
School of Electrical and Computer Engineering, Oklahoma State University, Stillwater, Oklahoma, 74078, USA.
Sci Rep. 2017 Jul 28;7(1):6817. doi: 10.1038/s41598-017-07296-4.
We experimentally demonstrate a highly efficient, broadband linear polarization converter functioning at terahertz frequencies. The linear polarization converter is composed of three metasurfaces and two dielectric layers interlaced with each other. The neighboring unit cells of the central metasurface layer of the linear polarization converter exhibit strong electromagnetic coupling, which increases the number of resonances and results in significant bandwidth broadening. The simulation and experimental results show that in the frequency range of 0.2 to 0.4 THz, the proposed polarization converter has a flat transmission curve and exhibits a transmission efficiency that is higher than 80%. High performance terahertz polarization conversion is desirable in many fields, such as terahertz spectroscopy, imaging, and communications.
我们实验演示了一种在太赫兹频率下工作的高效、宽带线性偏振转换器。该线性偏振转换器由三个超表面和两个介电层相互交织而成。线性偏振转换器中心超表面层的相邻单元表现出强烈的电磁耦合，这增加了共振的数量，从而导致带宽显著拓宽。仿真和实验结果表明，在 0.2 到 0.4 THz 的频率范围内，所提出的偏振转换器具有平坦的传输曲线，并且表现出高于 80%的传输效率。在太赫兹光谱学、成像和通信等许多领域，高性能的太赫兹偏振转换是理想的。
