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Broadband Efficient Dual‐Polarization Airy Beam Generation with Reflective Metasurface
Physica Status Solidi (B) - Basic Solid State Physics ( IF 1.6 ) Pub Date : 2021-02-24 , DOI: 10.1002/pssb.202100002
Chao Wu 1, 2 , Quan Li 1, 3 , Song Zhao 1 , Zhihui Zhang 1 , Xuan Liu 1 , Shijie Wei 1 , Hongqiang Li 1, 2
Affiliation  

This study demonstrates that continuous amplitude and binary phase modulation suitable for Airy beam encoding can be frequency‐independently obtained with not only cross‐polarized but also copolarized transmitted/reflected electromagnetic field components by rotation of unit cell with reflection symmetry. Maximum device efficiency can be achieved with relevant Airy beam generator, when the eigen polarization states of the unit cell are two orthogonal linear polarization states, and the copolarization reflections of them are out of phase and both have the amplitude of unity. As a proof of principle, broadband and high‐efficiency reflective Airy beam generators based on both copolarization and cross‐polarization modulation approaches are fabricated with cut‐wire structure as unit cell. The measured results show that the efficiency of the devices is approaching the theoretical limit in a wide frequency range.

中文翻译:

具有反射超表面的宽带高效双极化通风光束产生

这项研究表明,通过反射对称的晶胞旋转,不仅可以通过交叉极化而且可以通过发射/反射电磁场分量来实现频率独立地获得适用于Airy波束编码的连续幅度和二进制相位调制。当晶胞的本征偏振态是两个正交的线性偏振态,并且它们的同偏振反射异相并且都具有单位幅度时,可以通过相关的艾里射束发生器实现最大的器件效率。作为原理的证明,基于切线结构作为单位单元,制造了基于同极化和交叉极化调制方法的宽带和高效反射式艾里光束发生器。
更新日期:2021-05-05
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