Ultra-thin anisotropic metasurface for polarized beam splitting and reflected beam steering applications

作者：Guo, Wenlong^*; Wang, Guangming; Li, Tangjing; Li, Haipeng; Zhuang, Yaqiang; Hou, Haisheng

来源：Journal of Physics D: Applied Physics , 2016, 49(42): 425305.

DOI：10.1088/0022-3727/49/42/425305

• metasurface
• beam steering
• polarization beam splitter

In this paper, we propose a polarization beam splitter utilizing an ultra-thin anisotropic metasurface. The proposed anisotropic element is composed of triple-layered rectangular patches spaced with double-layered dielectric isolators. By tailoring the metallic patches, the cell is capable of transmitting x-polarized waves efficiently and reflecting y-polarized beams with almost 100% efficiency at 15 GHz. In addition to this, the reflected phases can be modulated by adjusting the size of the element, which contributes to beam steering in reflection mode. By assigning gradient phases on the metasurface, the constructed sample has the ability to refract x-polarized waves normally and reflect y-polarized beams anomalously. For verification, a sample with a size of 240 x 240 mm(2) is fabricated and measured. Consistent numerical and experimental results have both validated the efficiently anomalous reflection for y-polarized waves and normal refraction for x-polarized beams operating from 14.6-15.4 GHz. Furthermore, the proposed sample has a thickness of 0.1 lambda at 15 GHz, which provides a promising approach for steering and splitting beams in a compact size.

• 出版日期2016-10-26
• 单位中国人民解放军空军工程大学