We propose a reflective metasurface based on an artificial admittance modulation surface to generate three-dimensional spatially curved beams. The phase acquisition utilized to modulate this sinusoidally varying surface admittance combines the enveloping theory of differential geometry and the method for producing two-dimensional Bessel beams. The metasurface is fabricated, and the comparison between the full-wave simulations and experimental results demonstrates good performance of three-dimensional spatially curved beams generated by the metasurface.

中文翻译：

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由超表面产生的三维空间弯曲局部贝塞尔光束

我们提出了一种基于人工导纳调制表面的反射超表面，以生成三维空间弯曲光束。用于调制这种正弦变化表面导纳的相位采集结合了微分几何的包络理论和产生二维贝塞尔光束的方法。制造了超表面，全波模拟和实验结果之间的比较表明，超表面产生的三维空间弯曲光束具有良好的性能。