Dual-Polarized Dual-Channel Helicity-Switching or Helicity-Preserving Retroreflectors Utilizing 1-Bit Coding Metasurfaces,ACS Applied Electronic Materials

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Dual-Polarized Dual-Channel Helicity-Switching or Helicity-Preserving Retroreflectors Utilizing 1-Bit Coding Metasurfaces
ACS Applied Electronic Materials ( IF 4.3 ) Pub Date : 2020-09-14 , DOI: 10.1021/acsaelm.0c00650
Chunsheng Guan _{1,

2} , Haoyu Li ₁ , Xumin Ding _{1,

2,

3} , Zhuochao Wang _{1,

2} , Kuang Zhang _{2,

3} , Ming Jin ₂ , Shah Nawaz Burokur ₄ , Jian Liu ₁ , Qun Wu ₂

Affiliation

In this paper, two dual-polarized dual-channel retroreflectors utilizing 1-bit coding metasurfaces with opposite phase compensation are proposed to achieve helicity-switching and helicity-preserving performances. Compared to previously designed multichannel retroreflectors based on impedance matching, a method combining Floquet harmonics theory and antenna array theory is proposed to achieve desired dual-polarized dual-channel retroreflection with simple 0.1λ₀ thick ground-backed patch unit cell structures. It is further shown that relatively high retroreflections are obtained for a wide range of incident angles, which are frequency-dependent and thus open the door to interesting opportunities in target localization. As a proof of concept, two retroreflectors are designed, simulated, fabricated, and measured. The measured results show that high aperture efficiencies of above 83% can be achieved for all channels of the proposed retroreflectors under an incidence angle of 60°, which agrees very well with theoretical predictions and numerical simulations. Such ultrathin, dual-channel, dual-polarized, wide-angle, and high-efficiency retroreflectors show great application potential in integrated and miniaturized sensing and communication systems.

中文翻译：

使用1位编码超表面的双极化双通道螺旋切换或保留螺旋的后向反射镜

本文提出了两个利用具有相反相位补偿的1位编码超表面的双极化双通道回射器来实现螺旋度切换和螺旋度保持性能。与基于阻抗匹配先前设计的多信道后向反射器，结合弗洛凯谐波理论和天线阵列理论提出一种方法，以实现与简单0.1λ期望双极化双通道回射₀厚厚的地面支撑贴片晶胞结构。进一步示出，对于宽范围的入射角获得相对较高的回射，这些入射角是频率相关的，因此为目标定位中的有趣机会打开了大门。作为概念证明，设计，模拟，制造和测量了两个后向反射器。测量结果表明，在60°入射角下，拟议的后向反射器的所有通道均可实现高于83％的高孔径效率，这与理论预测和数值模拟非常吻合。这种超薄，双通道，双偏振，广角和高效回射器在集成和小型化的传感和通信系统中显示出巨大的应用潜力。

更新日期：2020-10-28

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