Exploding light beams and exploding vortex beams with orbital angular momentum are a family of paraxial beams with cylindrically symmetric intensity profiles that carry finite power and produce singular focal intensities when ideally focused, thus mimicking the behavior of focused plane waves but with finite power. In this work, we have realized them over finite apertures using amplitude and phase metasurfaces and have observed the real-world manifestations of the singularity: boundless growth of the focal peak intensity and resolution power as the aperture radius increases, illustrating the potential of exploding beams to outperform the focusing capabilities of conventional Gaussian and Laguerre-Gaussian beams. The compact footprint of metasurfaces and the precise control enabled by exploding beams on the peak intensity, resolution power, and vortex size make this platform potentially useful in a wide range of applications, from optical tweezers and spanners to microscopy.

中文翻译：

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振幅和相位全电介质超表面产生的爆炸涡旋光束的观察


具有轨道角动量的爆炸光束和爆炸涡旋光束是一系列具有圆柱对称强度分布的近轴光束，它们携带有限的功率并在理想聚焦时产生奇异的焦点强度，从而模仿聚焦平面波的行为但具有有限的功率。在这项工作中，我们使用振幅和相位超表面在有限孔径上实现了它们，并观察到了奇点的现实世界表现：随着孔径半径的增加，焦点峰值强度和分辨率的无限增长，说明了爆炸光束的潜力优于传统高斯光束和拉盖尔高斯光束的聚焦能力。超表面的紧凑占地面积以及通过爆炸光束对峰值强度、分辨率功率和涡流尺寸实现的精确控制使得该平台具有广泛的应用前景，从光学镊子和扳手到显微镜。