Linear to circular polarization conversion in the sharp focus of an optical vortex

Linear to circular polarization conversion in the sharp focus of an optical vortex

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We have shown that when sharply focusing a linearly polarized optical vortex with topological charge off white 5000 puffs 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 iphone xr price calgary 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.