Roux, FS2014-07-302014-07-302014-02Roux, F.S. 2014. Vitality of optical vortices. In: Complex Light and Optical Force VIII, SPIE Photonics West 2014, Moscone Center, San Francisco, California USA, 5 February 2014http://spie.org/Publications/Proceedings/Paper/10.1117/12.2038815http://hdl.handle.net/10204/7530Complex Light and Optical Force VIII, SPIE Photonics West 2014, Moscone Center, San Francisco, California USA, 5 February 2014Optical 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.enOptical vortex dipoleVortex pair annihilationVortex pair creationVorticityConference PresentationRoux, F. (2014). Vitality of optical vortices. SPIE Proceedings. http://hdl.handle.net/10204/7530Roux, FS. "Vitality of optical vortices." (2014): http://hdl.handle.net/10204/7530Roux F, Vitality of optical vortices; SPIE Proceedings; 2014. http://hdl.handle.net/10204/7530 .TY - Conference Presentation AU - Roux, FS AB - 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. DA - 2014-02 DB - ResearchSpace DP - CSIR KW - Optical vortex dipole KW - Vortex pair annihilation KW - Vortex pair creation KW - Vorticity LK - https://researchspace.csir.co.za PY - 2014 T1 - Vitality of optical vortices TI - Vitality of optical vortices UR - http://hdl.handle.net/10204/7530 ER -