Spin Hall effect of light in photon tunneling

Details Spin Hall effect of light in photon tunneling Spin Hall effect of light in photon tunneling

2010-04-25

arxiv.org/abs/1004.4345v3

Phys.Rev.A82:043825,2010

Physics

Optics

8 pages, 5 figures

Scientific paper

10.1103/PhysRevA.82.043825

We resolve the breakdown of angular momentum conservation on two-dimensional photon tunneling by considering spin Hall effect (SHE) of light. This interesting effect manifests itself as polarization-dependent transverse shifts for a classic wave packet tunneling through a prism-air-prism barrier. For a certain circularly polarized component, the transverse shifts can be modulated by altering the refractive index gradient associated with the two prisms. We find that the SHE in conventional beam refraction can be evidently enhanced via photon tunneling mechanism. The polarization-dependent transverse shift is governed by the total angular momentum conservation law, while the polarization-dependent angular shift is governed by the total linear momentum law. These findings open the possibility for developing new nano-photonic devices and can be extrapolated to other physical systems.

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