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光学超构表面中的复合相位调控

Composite-phase manipulation in optical metasurfaces

  • 摘要: 超构表面是一种二维的超构材料,能在平面上实现对光波相位、振幅、偏振等参数的灵活调控。相位型超构表面可突破经典折反射定律,使得光场调控不再依赖于曲面光学元件,为实现光学系统的平面化、集成化和多功能化提供了有效途径。特别地,通过对传输相位和几何相位协同调控,能够有效解决传统超构表面存在的功能单一、带宽受限、可调谐性差等原理性问题。文章介绍了复合相位调控的实现原理和方法,以及复合相位超构表面的典型应用及特点,最后对复合相位超构表面的未来研究方向进行了总结和展望。

     

    Abstract: Metasurfaces, a kind of two-dimensional metamaterials, can flexibly manipulate the phase, amplitude, polarization and other parameters of light waves on a flat plane. Phase gradient metasurfaces can defy the classical laws of refraction and reflection so that light field manipulation no longer needs to rely on curved optical elements, while an effective way can be provided to realize an integrated multifunctional planar optical system. In particular, through the coordinated regulation of the geometric phase and propagation phase, composite-phase metasurfaces can efficiently solve the basic drawbacks of single functionality, limited bandwidth, poor tunability, and so forth. In this work, we review the principle and method of composite-phase manipulation, and the typical applications and characteristics of composite-phase metasurfaces. Finally, we summarize and look ahead to future research directions.

     

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