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arXiv · 1905.12539

Spin-Orbit Coupling and the Evolution of Transverse Spin

Jörg S. Eismann·Peter Banzer·Martin Neugebauer
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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.

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Jörg S. Eismann, Peter Banzer, Martin Neugebauer. 2019-05-29. Spin-Orbit Coupling and the Evolution of Transverse Spin. https://doi.org/10.1103/physrevresearch.1.033143

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