Geometrodynamics of Spinning Light

Details Geometrodynamics of Spinning Light Geometrodynamics of Spinning Light

2008-10-12

arxiv.org/abs/0810.2136v1

Nature Photon. 2, 748-753 (2008)

Physics

Optics

18 pages, 4 figures, to appear in Nature Photonics

Scientific paper

10.1038/nphoton.2008.229

The semiclassical evolution of spinning particles has recently been re-examined in condensed matter physics, high energy physics, and optics, resulting in the prediction of the intrinsic spin Hall effect associated with the Berry phase. A fundamental nature of this effect is related to the spin-orbit interaction and topological monopoles. Here we report a unified theory and a direct observation of two mutual phenomena: a spin-dependent deflection (the spin Hall effect) of photons and the precession of the Stokes vector along the coiled ray trajectory of classical geometrical optics. Our measurements are in perfect agreement with theoretical predictions, thereby verifying the dynamical action of the topological Berry-phase monopole in the evolution of light. These results may have promising applications in nano-optics and can be immediately extrapolated to the evolution of massless particles in a variety of physical systems.

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