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25 February 2014 Vitality of optical vortices
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Proceedings Volume 8999, Complex Light and Optical Forces VIII; 89990T (2014)
Event: SPIE OPTO, 2014, San Francisco, California, United States
Optical vortices are always created or annihilated in pairs with opposite topological charges. However, the presence of such a vortex dipole does not directly indicate whether they are associated with a creation or an annihilation event. Here we propose a method to distinguish between vortex dipoles that have just been created and those that are about to be annihilated. We use first and second order transverse derivatives of the optical field to construct a quantity that reveals the nature of the dipoles. Numerical examples are provided as demonstration of the method.
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Filippus S. Roux "Vitality of optical vortices", Proc. SPIE 8999, Complex Light and Optical Forces VIII, 89990T (25 February 2014);

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