论文标题
血浆涡流腔中的轨道角动量繁殖
Orbital angular momentum multiplication in plasmonic vortex cavities
论文作者
论文摘要
光的轨道角动量是光子学的核心特征。它使用血浆限制在表面上，已解锁了许多现象和潜在的应用。在这里，我们介绍了从结构边界作为产生和控制等离子轨道角动量的新自由度的反思。我们在实验上证明了等离子涡流腔，产生了一系列涡旋脉冲，拓扑电荷随时间的函数而增加。我们使用时间分辨的光发射电子显微镜跟踪了这些角度减速的等离子体脉冲序列的这些角度减速的等离子体脉冲序列的时空动力学，这表明角动量通过腔体手学的倍数增长。引入了血浆涡流传递的这种驯服轨道角动量的自由度，可以使小型泵浦探针样量子初始化方案微型化，增加等离子镊子施加的扭矩，并可能实现具有动态发展的拓扑结构的涡旋晶格晶格腔。
Orbital angular momentum of light is a core feature in photonics. Its confinement to surfaces using plasmonics has unlocked many phenomena and potential applications. Here we introduce the reflection from structural boundaries as a new degree of freedom to generate and control plasmonic orbital angular momentum. We experimentally demonstrate plasmonic vortex cavities, generating a succession of vortex pulses with increasing topological charge as a function of time. We track the spatio-temporal dynamics of these angularly decelerating plasmon pulse train within the cavities for over 300 femtoseconds using time-resolved Photoemission Electron Microscopy, showing that the angular momentum grows by multiples of the chiral order of the cavity. The introduction of this degree of freedom to tame orbital angular momentum delivered by plasmonic vortices, could miniaturize pump-probe-like quantum initialization schemes, increase the torque exerted by plasmonic tweezers and potentially achieve vortex lattice cavities with dynamically evolving topology.
