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Multichannel direct transmissions of near-field information
Light: Science & Applications ( IF 19.4 ) Pub Date : 2019-07-03 , DOI: 10.1038/s41377-019-0169-3
Xiang Wan 1 , Qian Zhang 1 , Tian Yi Chen 1 , Lei Zhang 1 , Wei Xu 2 , He Huang 2 , Chao Kun Xiao 2 , Qiang Xiao 1 , Tie Jun Cui 1
Affiliation  

A digital-coding programmable metasurface (DCPM) is a type of functional system that is composed of subwavelength-scale digital coding elements with opposite phase responses. By configuring the digital coding elements, a DCPM can construct dynamic near-field image patterns in which the intensity of each pixel of the image can be dynamically and independently modulated. Thus, a DCPM can perform both spatial and temporal modulations. Here, this advantage is used to realize multichannel direct transmissions of near-field information. Three points are selected in the near-field region to form three independent channels. By applying various digital phase codes on the DCPM, independent binary digital symbols defined by amplitude codes (namely, weak and strong amplitudes) are transmitted through the three channels. The measured near-field distributions and temporal transmissions of the system agree with numerical calculations. Compared with the conventional multichannel transmission, the proposed mechanism achieves simultaneous spatial and temporal modulations by treating DCPM as an energy radiator and information modulator, thereby enduing DCPM with high potential in near-field information processing and communications.



中文翻译:

近场信息多通道直接传输

数字编码可编程超表面(DCPM)是一种功能系统,由具有相反相位响应的亚波长级数字编码元件组成。通过配置数字编码元件,DCPM可以构建动态近场图像图案,其中图像的每个像素的强度可以被动态且独立地调制。因此,DCPM 可以执行空间调制和时间调制。这里利用这一优势实现近场信息的多通道直接传输。在近场区域选择三个点形成三个独立的通道。通过在DCPM上应用各种数字相位码,由幅度码(即弱幅度和强幅度)定义的独立二进制数字符号通过三个通道传输。测量的系统近场分布和时间传输与数值计算一致。与传统的多通道传输相比,该机制通过将DCPM视为能量辐射器和信息调制器来实现同时的空间和时间调制,从而赋予DCPM在近场信息处理和通信方面的巨大潜力。

更新日期:2019-11-18
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