Topological spin transport of photons: the optical Magnus Effect and Berry Phase

Details Topological spin transport of photons: the optical Magnus Effect and Berry Phase Topological spin transport of photons: the optical Magnus Effect and Berry Phase

2004-02-21

arxiv.org/abs/physics/0402110v1

Physics Letters A 333(3-4), 181-186 (2004)

Physics

Optics

4 pages, 1 figure

Scientific paper

10.1016/j.physleta.2004.10.035

The paper develops a modified geometrical optics (GO) of smoothly inhomogeneous isotropic medium, which takes into account two topological phenomena: Berry phase and the optical Magnus effect. By using the analogy between a quasi-classical motion of a quantum particle with a spin and GO of an electromagnetic wave in smoothly inhomogeneous media, we have introduced the standard gauge potential associated with the degeneracy in the wave momentum space. This potential corresponds to the Dirac-monopole-like field (Berry curvature), which causes the topological spin (polarization) transport of photons. The deviations of waves of right-hand and left-hand helicity occur in the opposite directions and orthogonally to the principal direction of motion. This produces a spin current directed across the principal motion. The situation is similar to the anomalous Hall effect for electrons. In addition, a simple scheme of the experiment allowing one to observe the topological spin splitting of photons has been suggested.

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