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An optically driven digital metasurface for programming electromagnetic functions
Nature Electronics ( IF 33.7 ) Pub Date : 2020-03-16 , DOI: 10.1038/s41928-020-0380-5
Xin Ge Zhang , Wei Xiang Jiang , Hao Lin Jiang , Qiang Wang , Han Wei Tian , Lin Bai , Zhang Jie Luo , Shang Sun , Yu Luo , Cheng-Wei Qiu , Tie Jun Cui

Metasurfaces are engineered surfaces that consist of subwavelength periodic elements and can be used to manipulate electromagnetic waves. Multifunctional or reconfigurable electromagnetic meta-devices based on a direct-current biasing system can be built using lumped electronic components. However, such meta-devices require bulky power supplies, field-programmable gate arrays, electrical wires and complex control circuits. Here, we report a digital metasurface platform that can be programmed optically to implement electromagnetic functions. Our digital platform has 6 × 6 subarrays, each of which contains 4 × 4 metasurface elements based on electronic varactors integrated with an optical interrogation network based on photodiodes. The interrogation network can convert visible light illumination patterns to voltages and applies bias to the metasurface elements, generating specific microwave reflection phase distributions. To illustrate the capabilities of our approach, we use the optically driven digital metasurface for external cloaking, illusion and dynamic vortex beam generation.



中文翻译:

光学驱动的数字超表面,用于对电磁功能进行编程

超表面是由亚波长周期性元素组成的工程表面,可用于操纵电磁波。可以使用集总电子元件来构建基于直流偏置系统的多功能或可重新配置的电磁元设备。但是,这样的元设备需要庞大的电源,现场可编程门阵列,电线和复杂的控制电路。在这里,我们报告了一个可以通过光学方式实现电磁功能的数字超表面平台。我们的数字平台有6×6个子阵列,每个子阵列包含4×4个基于电子变容二极管的超表面元件,这些变元与基于光电二极管的光学询问网络集成在一起。询问网络可以将可见光照明图案转换为电压,并向超表面元素施加偏压,从而生成特定的微波反射相位分布。为了说明我们的方法的功能,我们使用光学驱动的数字超颖表面进行外部隐身,幻觉和动态涡旋光束生成。

更新日期:2020-04-24
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