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- W3010835931 abstract "Using Richards-Wolf formulas, we show that an axisymmetric circularly polarized vortex-free field can be focused into a sharp subwavelength focal spot, around which there is a region where the light energy flow propagates along a spiral. This effect can be explained by the conversion of the spin angular momentum of the circularly polarized field into the orbital angular momentum near the focus, although the on-axis orbital angular momentum remains zero. It is also shown that a linearly polarized optical vortex with topological charge 2 forms near the focal plane an on-axis reverse energy flow (defined by the negative longitudinal component of the Poynting vector) whose amplitude is comparable with the direct energy flow." @default.
- W3010835931 created "2020-03-23" @default.
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- W3010835931 date "2020-02-01" @default.
- W3010835931 modified "2023-09-24" @default.
- W3010835931 title "Vortex energy flow in the tight focus of a non-vortex field with circular polarization" @default.
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- W3010835931 doi "https://doi.org/10.18287/2412-6179-co-582" @default.
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