Active Anisotropic Coding Metasurface with Independent Real‐Time Reconfigurability for Dual Polarized Waves,Advanced Materials Technologies

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Active Anisotropic Coding Metasurface with Independent Real‐Time Reconfigurability for Dual Polarized Waves
Advanced Materials Technologies ( IF 6.4 ) Pub Date : 2019-12-19 , DOI: 10.1002/admt.201900930
Ke Chen ₁ , Na Zhang ₁ , Guowen Ding ₁ , Junming Zhao ₁ , Tian Jiang ₁ , Yijun Feng ₁

Affiliation

Active metasurfaces incorporated with active elements can achieve tunable and/or reconfigurable functionalities controlled by external stimuli, providing a new platform that may radically change the way people dynamically manipulate electromagnetic waves. Despite the rapid growth, most of the active metasurfaces so far are polarization‐sensitive structures that only support tunable responses for excitation with a certain single polarization. Here, an ultrathin active anisotropic metasurface loaded with voltage‐controlled varactors is reported to enable independent dual‐polarization wavefront control. In particular, multichannel voltage output hardware system is used to realize 1‐bit and 2‐bit active coding metasurface with real‐time reconfigurability independent for two linear‐polarization channels. As the design examples, it is experimentally demonstrated that the far‐field scattering behaviors of the metasurface for orthogonal two polarizations can be dynamically and independently tuned with totally distinct functionalities by simultaneously encoding dual‐channel spatial coding sequences. The proposed concept of active anisotropy has largely enhanced the information capacity of the metasurface, bringing new degrees of freedom in achieving versatile tunable functionalities and offering untapped potentials for sophisticated electromagnetic wave manipulation such as dynamical signal processing, holography, arbitrary beam shaping, etc.

中文翻译：

具有独立实时可重构性的双极化波主动各向异性编码超表面

结合有活动元素的活动超表面可以实现由外部刺激控制的可调谐和/或可重新配置的功能，从而提供一种可以从根本上改变人们动态操纵电磁波方式的新平台。尽管增长迅速，但到目前为止，大多数活动超表面都是偏振敏感的结构，仅对具有特定单个偏振的激发仅支持可调响应。在此，据报道，装有压控变容二极管的超薄有源各向异性超表面能够实现独立的双极化波前控制。特别是，多通道电压输出硬件系统用于实现具有独立于两个线性极化通道的实时可重新配置性的1位和2位有源编码超颖表面。作为设计示例，实验表明，通过同时编码双通道空间编码序列，可以完全独立地动态且独立地调整正交两个极化的超表面的远场散射行为。提出的主动各向异性概念极大地增强了超表面的信息容量，为实现通用的可调功能带来了新的自由度，并为复杂的电磁波操纵（例如动态信号处理，全息术，任意波束成形等）提供了未开发的潜力。

更新日期：2020-02-10

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