Dresden 2011 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 36: Poster Session II (Metals; Nanostructures at surfaces; Surface or interface magnetism; Spin-Orbit Interaction at Surfaces; Electron and spin dynamics; Surface dynamics; Methods; Theory and computation of electronic structure)
O 36.83: Poster
Dienstag, 15. März 2011, 18:30–22:00, P4
Geometric spin-Hall effect of light in highly focused vector beams — •Martin Neugebauer1,2, Peter Banzer1,2, Thomas Bauer1,2, Andrea Aiello1,2, Norbert Lindlein2, and Gerd Leuchs1,2 — 1Max Planck Institute for the Science of Light, Günther-Scharowsky-Str. 1, D-91058 Erlangen, Germany — 2Institute of Optics, Information and Photonics, University Erlangen-Nuremberg, Staudtstr. 7/B2, D-91052 Erlangen, Germany
Optical angular momentum plays a key role in many fundamental and applied research areas. One example for its appearance is the spin Hall-effect of light (SHEL). The SHEL amounts to the split of a linearly polarized light beam at an interface into its two right- and left-handed circularly polarized components.
In a recent paper [1] it has been shown that in a beam observed from a tilted reference frame a polarization dependent intensity shift of the Barycenter is found. This can be interpreted as a purely geometric effect (gSHEL).
We investigate this gSHEL in highly focused vector beams. The highly focused beam consists of left-handed and right-handed circularly polarized light generated by a split aperture. We use a sub-wavelength nano-particle for probing the focal field distribution experimentally. First results of these measurements are shown and compared to analytical calculations.
[1] A. Aiello et al., PRL 103, 100401 (2009)