Structure and transportation of electron vortices in near-critical density plasmas driven by ultrashort intense laser pulses have been studied by multi-dimensional particle-in-cell simulations. Dimensional features of electron vortices are revealed. In two-dimensional geometry, two electron vortices and a quasi-static magnetic dipole are closely coupled. In three-dimensional geometry, a moving electron vortex ring associated with a closed magnetic ring moves in near-critical density plasmas. Such structure can transport some energy to the region where the laser pulse cannot reach. It is found that the motion of plasma ions makes the vortex magnetic energy dissipate quickly. These studies provide possible connection of electron vortices in nature with laser plasma experiments.
超短超强激光脉冲驱动的近临界密度等离子体中电子涡旋的结构与输运，已通过多维粒子模拟方法进行研究。揭示了电子涡旋的维度特征。在二维几何中，两个电子涡旋与一个准静态磁偶极子紧密耦合。在三维几何中，一个运动的电子涡旋与一个闭合磁环相关联，并在近临界密度等离子体中移动。这种结构能够将能量输运至激光脉冲无法到达的区域。研究发现，等离子体离子的运动会使涡旋磁能快速耗散。这些研究为自然界中电子涡旋与激光等离子体实验之间提供了可能的联系。