相位不连续超材料表面的研究进展

Progress on metasurface with phase discontinuities

摘要:

近年来，超材料表面性能研究得到快速发展，在电磁波亚波长操纵等领域展现了独特的应用前景。超材料表面通常由许多周期性排列的金属结构单元组成，如果合适地设计结构单元的几何构型，就能够按照意愿得到拥有特定光学性质的材料。对近期利用相位不连续超材料表面对电磁波进行操控的研究进展进行了综述，包括：利用相位不连续表面控制电磁波出射方向；利用相位不连续表面结构合成圆偏振光；相位不连续应用于隐身；太赫兹波段相位不连续结构的应用；最后对该研究领域的发展进行了展望。

Abstract:

Recently, metasurface has developed rapidly, showing potential applications in the field such as Electro-Magnetic(EM) wave subwavelength manipulation. Metasurface which is made up of many periodical metallic unit cells can obtain many special optical properties at will if the structure of unit cell can be designed exactly. Recent progress on manipulation of the EM wave by metasurface with phase discontinuities is reviewed in this paper, including controlling the propagation direction of EM waves, synthesizing circular polarization of EM waves, cloaking, application of phase discontinuity structure in terahertz band. Finally, the further research in this field is prospected.