It has been recently shown that specially engineered light beams have the remarkable ability to propagate along curved trajectories in vacuum. Current methods for generating accelerating beams use phase modulators and lenses, leading to length scales on the order of tens of centimeters or larger. This poses constraints and severely limits their applicability inside materials. Here, we accelerate light inside glass using a metasurface consisting of plasmonic nanoantennas. Highly bending beams with radii of curvature on the order of a hundred micrometers were generated, and the imaged intensities agree well with theory. Our approach for generating accelerating beams allows for their integration into on-chip photonic systems.

中文翻译：

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通过超表面加速光

最近显示，经过特殊设计的光束具有在真空中沿着弯曲轨迹传播的显着能力。当前产生加速光束的方法使用相位调制器和透镜，从而导致数十厘米或更大的长度尺度。这带来了限制，并严重限制了它们在材料内部的适用性。在这里，我们使用由等离子纳米天线组成的超表面来加速玻璃内部的光。产生了曲率半径为一百微米量级的高度弯曲的光束，并且成像强度与理论很好地吻合。我们产生加速光束的方法允许将其集成到片上光子系统中。