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2 November 2011 Angular momenta and spin-orbit interaction for nonparaxial beams
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It is well known that, for any monochromatic field, the spatial extent of the focus has a lower bound dependent on the field's directional spread. The influence that the orbital angular momentum and, for vector fields, the (spin) angular momentum due to polarization have on this lower bound are studied here for fields not constrained by the paraxial approximation. A ray-optical interpretation of the effect of orbital and spin angular momentum on the spatial spread is provided for the case of Bessel beams.
© (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Miguel A. Alonso and Konstantin Bliokh "Angular momenta and spin-orbit interaction for nonparaxial beams", Proc. SPIE 8011, 22nd Congress of the International Commission for Optics: Light for the Development of the World, 80116H (2 November 2011);

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