揭示轨道angular momentum和电子束加速
Unveiling the orbital angular momentum and acceleration of electron beams
摘要:
近年来,电子束的新形式得到了广泛的研究,包括携带轨道角动量的涡旋束和沿抛物线轨道传输的艾里束。它们的特性可以用于材料科学、电子显微镜和干涉测量,因此容易测量它们的特性是很重要的。在这里,我们展示了如何可以立即量化这些光束的参数,而不需要额外的制造或非标准的显微镜工具。我们的实验结果得到了数值模拟和解析推导的支持。
英文摘要:
New forms of electron beams have been intensively investigated recently, including vortex beams carrying orbital angular momentum, as well as Airy beams propagating along a parabolic trajectory. Their traits may be harnessed for applications in materials science, electron microscopy and interferometry, and so it is important to measure their properties with ease. Here we show how one may immediately quantify these beams' parameters without need for additional fabrication or non-standard microscopic tools. Our experimental results are backed by numerical simulations and analytic derivation.
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