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.
© 2001 Optical Society of America
(120.4820) Instrumentation, measurement, and metrology : Optical systems
(170.4520) Medical optics and biotechnology : Optical confinement and manipulation
(260.0260) Physical optics : Physical optics
Gabriel Molina-Terriza, Lluis Torner, Ewan M. Wright, Juan J. García-Ripoll, and Víctor M. Pérez-García, "Vortex revivals with trapped light," Opt. Lett. 26, 1601-1603 (2001)