Li Zhongpeng, Bai Yafeng, Tian Ye
Opt Lett. 2021 Jan 15;46(2):336-339. doi: 10.1364/OL.414087.
The optical vortex has been widely studied owing to its specific characteristics such as the orbital angular momentum, hollow intensity distribution, and topological charge. We report the generation of electromagnetic solitons with angular momentum and the conversion of angular momentum via a circularly polarized (CP) laser and underdense plasma interactions on the basis of three-dimensional particle-in-cell simulations. We find that when a CP laser is incident into the underdense plasma, a longitudinal current will be induced off the laser axis, which is critical for the angular momentum conversion. This novel, to the best of our knowledge, regime will allow potential applications such as optical control and electron manipulation.
由于光学涡旋具有诸如轨道角动量、空心强度分布和拓扑电荷等特殊特性，因此已得到广泛研究。我们基于三维粒子模拟，报告了具有角动量的电磁孤子的产生以及通过圆偏振（CP）激光与低密度等离子体相互作用实现的角动量转换。我们发现，当CP激光入射到低密度等离子体中时，会在激光轴外感应出纵向电流，这对角动量转换至关重要。据我们所知，这种新颖的机制将允许诸如光学控制和电子操纵等潜在应用。
