Orbit-induced localized spin angular momentum of vector circular Airy vortex beam in the paraxial regime

• DOI: 10.1364/oe.423027
• Publication Date: 2021-04-16T14:31:24Z
• Authors: Tao Geng; MIN Li; Hanming Guo
• Keywords: Optical vortex; Azimuthal quantum number

We theoretically study the propagation properties of vector circular Airy vortex beam in detail. The results show that orbital angular momentum can induce a localized spin after autofocusing paraxial regime, which leads to an abrupt polarization transition just before focal plane. However, there is no conversion from during whole process. provide intuitive explanation for appearance such localization. This investigation expected advance our understanding and optical spin-orbit coupling.