Abstract
The family of Poincare beams has three characteristics including two real-valued angular characteristics, which descibe a concrete polarisation state on the Poincare sphere and a third integer characteristic l determining the beam singularity order. It was theoretically and numerically shown that at l = 2, an energy backflow is generated near the optical axis. It was revealed that at certain Poincare beams characteristics, the energy flow revolves around the optical axis because of spin-orbital conversion. It was also demonstrated that a radial optical Hall phenomenon took place in the compact focus of Poincare beams.
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Funding
This work was supported by the Russian Science Foundation, project no. 22-12-00137 (in part of analytical investigation in Sections 2–4) and by FSRC “Crystallography and Photonics.” Russian Academy of Sciences, State Assignment 00137 (in part of numerical simulation in Section 5).
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Kotlyar, V.V., Stafeev, S.S., Zaitsev, V.D. et al. Poincare Beams in Tight Focus. Opt. Mem. Neural Networks 32 (Suppl 1), S109–S119 (2023). https://doi.org/10.3103/S1060992X23050119
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DOI: https://doi.org/10.3103/S1060992X23050119