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Spin-orbit coupling affecting the evolution of transverse spin

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Eismann,  Jörg
Interference Microscopy and Nanooptics, Leuchs Emeritus Group, Emeritus Groups, Max Planck Institute for the Science of Light, Max Planck Society;

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Banzer,  Peter
Interference Microscopy and Nanooptics, Leuchs Emeritus Group, Emeritus Groups, Max Planck Institute for the Science of Light, Max Planck Society;

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Neugebauer,  Martin
Interference Microscopy and Nanooptics, Leuchs Emeritus Group, Emeritus Groups, Max Planck Institute for the Science of Light, Max Planck Society;

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Citation

Eismann, J., Banzer, P., & Neugebauer, M. (2019). Spin-orbit coupling affecting the evolution of transverse spin. Physical Review Research, 1(3), 033143-1-033143-4. doi:10.1103/PhysRevResearch.1.033143.


Cite as: https://hdl.handle.net/21.11116/0000-0003-BA9A-E
Abstract
We investigate the evolution of transverse spin in tightly focused circularly polarized beams of light, where spin-orbit coupling causes a local rotation of the polarization ellipses upon propagation through the focal volume. The effect can be explained as a relative Gouy-phase shift between the circularly polarized transverse field and the longitudinal field carrying orbital angular momentum. The corresponding rotation of the electric transverse spin density is observed experimentally by utilizing a recently developed reconstruction scheme, which relies on transverse-spin-dependent directional scattering of a nano-probe.