Abstract

We show that light spiraling like a tornado can be generated by superimposing abruptly auto-focusing ring-Airy beams that carry orbital angular momentum of opposite handedness. With different parabolic propagation trajectories, the superimposing ring-Airy beams are tailored to abruptly auto-focus at overlapping focal regions. This results in a complex wave with intense lobes that twist and shrink in an accelerating fashion along propagation. By achieving angular acceleration values that exceed 295  rad/mm2, these tornado waves can find numerous applications in laser trapping, direct laser writing, and high-harmonic generation.

© 2020 Optical Society of America

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Supplementary Material (3)

NameDescription
» Visualization 1       Visualization 1. Intensity and phase (x,y) cross-sectional images as a function of the propagation for a Tornado wave resulting from the superposition of two ring-Airy beams that carry OAM of topological charge +1,-1 respectively
» Visualization 2       Visualization 2. Intensity and phase (x,y) cross-sectional images as a function of the propagation for a Tornado wave resulting from the superposition of two ring-Airy beams that carry OAM of topological charge +2,-1 respectively
» Visualization 3       Visualization 3. Intensity and phase (x,y) cross-sectional images as a function of the propagation for a Tornado wave resulting from the superposition of two ring-Airy beams that carry OAM of topological charge +2,-2 respectively

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