Spin and orbital Hall effects for diffracting optical beams in gradient-index media

Details Spin and orbital Hall effects for diffracting optical beams in gradient-index media Spin and orbital Hall effects for diffracting optical beams in gradient-index media

2008-11-29

arxiv.org/abs/0812.0113v2

Phys. Rev. A 79, 011807(R) (2009)

Physics

Optics

4 pages, 2 figures, to appear in Phys. Rev. A

Scientific paper

10.1103/PhysRevA.79.011807

We examine the evolution of paraxial beams carrying intrinsic spin and orbital angular momenta (AM) in gradient-index media. A parabolic-type equation is derived which describes the beam diffraction in curvilinear coordinates accompanying the central ray. The center of gravity of the beam experiences transverse AM-dependent deflections -- the spin and orbital Hall effects. The spin Hall effect generates a transverse translation of the beam as a whole, in precise agreement with recent geometrical optics predictions. At the same time, the orbital Hall effect is significantly affected by the diffraction in the inhomogeneous medium and is accompanied by changes in the intrinsic orbital AM and deformations of the beam.

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