Vortex revivals with trapped light.
We predict that vortex dipoles nested in light beams trapped in graded-index media can undergo closed Berry trajectories, yielding periodic vortex annihilations and revivals along the light-propagation direction. The vortex revivals from vortex-free wave fronts are mediated by Freund stationary point bundles that carry the necessary Poincaré-Hopf indices. Vortex spiraling and spontaneous generation of circular-edge dislocations are also found to occur.
G
G
Molina-Terriza
L
L
Torner
E M
EM
Wright
J J
JJ
García-Ripoll
V M
VM
Pérez-García