Smart Materials Laboratory, Department of Applied Physics, Northwestern Polytechnical University, Xi'an 710129, China.
Molecules. 2020 Apr 4;25(7):1664. doi: 10.3390/molecules25071664.
A reflective metasurface model composed of silver dendritic units is designed in this study. The integral property of this metasurface, which consists of an upper layer of dendritic structures, a silica spacer, and a bottom silver substrate was demonstrated at visible wavelengths. The simulation results revealed that the metasurface can perform integral operation in the yellow and red bands; this can be easily generalized to the infrared and communication bands by scaling the transverse dimensions of this metasurface. A dendritic metasurface sample responding to red light was prepared via the bottom-up electrochemical deposition method. The integral operation property of the sample was verified experimentally. This dendritic metasurface, which can perform integral operation in visible light, can be used for big data processing technology, real-time signal processing, and beam shaping, and provides a new method for miniaturized and integrated all-optical signal processing systems.
本研究设计了一种由银树枝状单元组成的反射式超表面模型。该超表面由上层树枝状结构、二氧化硅间隔层和底部银衬底组成，在可见光波长下展示了其整体特性。模拟结果表明，该超表面可以在黄、红波段执行积分运算；通过缩放该超表面的横向尺寸，可以很容易地将其推广到红外和通信波段。通过自下而上的电化学沉积方法制备了对红光有响应的树枝状超表面样品，并通过实验验证了其积分运算特性。这种可以在可见光下执行积分运算的树枝状超表面可用于大数据处理技术、实时信号处理和波束成形，为小型化和集成全光信号处理系统提供了一种新方法。
