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This article is cited in 2 scientific papers (total in 2 papers)
OPTO-IT
Linear to circular polarization conversion in the sharp focus of an optical vortex
A. G. Nalimovab, S. S. Stafeevab a IPSI RAS – Branch of the FSRC "Crystallography and Photonics" RAS,
443001, Samara, Russia, Molodogvardeyskaya 151
b Samara National Research University, 443086, Samara, Russia, Moskovskoye Shosse 34
Abstract:
We have shown that when sharply focusing a linearly polarized optical vortex with topological charge 2, in the near-axis region of the focal plane, not only does a reverse energy flow (the negative on-axis projection of the Poynting vector) occur, but also the right-handed circular polariza-tion of light. Moreover, due to spin-orbital angular momentum conversion, the on-axis polarization vector and the transverse energy flow rotate around the optical axis in the same direction (counter-clockwise). If an absorbing spherical microparticle is put in the focus on the optical axis, it will rotate around the axis and around its center of mass counterclockwise. Numerical simulation results confirms the theoretical predictions.
Keywords:
polarization conversion, optical torque, optical tweezers, Maxwell stress tensor, rotation.
Received: 06.07.2020 Accepted: 27.07.2020
Citation:
A. G. Nalimov, S. S. Stafeev, “Linear to circular polarization conversion in the sharp focus of an optical vortex”, Computer Optics, 45:1 (2021), 13–18
Linking options:
https://www.mathnet.ru/eng/co876 https://www.mathnet.ru/eng/co/v45/i1/p13
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