Spatiotemporal controllable Airy-Airy-vortex light bullets in free space

摘要

Spatiotemporal controllable accelerating and decelerating Airy-Airy-vortex (CAiAiV) light bullets are obtained by solving the (3 + 1)-dimensional free space Schrodinger equation. For these light bullets, the temporal parts come from controllable Airy distributions, and the spatial parts come from controllable Airy vortex distributions. Their propagation properties are affected by the initial velocity, the topological charge and the decay factor. A positive initial velocity causes self-acceleration in both the spatial and the temporal domains of the CAiAiV light bullet, while negative initial velocity makes it first decelerate and then accelerate. The maximum decelerating deflection is determined by the negative initial velocity. The structure of CAiAiV light bullets is influenced by weakening the main lobe and strengthening the side lobes with the topological charge increasing. The peculiar propagation properties of the side lobes of such light bullets are also affected by the decay factors in X, Y and T directions. The superposition of different-order CAiAiV functions is also discussed.