Proceedings of 2015 Photonics & Electromagnetics Research Symposium, Prague, July 6 - 9,Page(s)1870-1872
Abstract
We study the propagation dynamics of vortex vector field with azimuthally locally
uniform and inhomogeneous polarization states by using angular spectrum the electromagnetic
beam. The evolution of the polarization states in the field cross section is analyzed numerically
in detail during propagation by using the Stokes polarization parameters. The results indicate
that the polarization states in the field cross section rotate along the propagation axis due to the
existence of vortex field. In particular, the interaction between the central phase singular point
(i.e., dislocation) and the polarization singular point (i.e., disclination) leads to the creation or
annihilation of optical field in the center of optical field, depending on the number of vortex
and polarization topological charges. The transverse energy flux distributions and both spin
and orbital optical angular momentum of vector vortex optical field with the different states of
polarization in the cross-section of the field are computed and analyzed. Our results indicate
that the different states of polarization in the cross-section of the optical vector vortex field can
influence and reconstruct the transverse Poyting vector (energy flux) and both spin and orbital
optical angular momentum flux distribution in the cross-section of the field. These results,
therefore, provide useful information on how to spatially manipulate the angular momentum of
laser beams by choosing appropriate states of polarization in the cross-section of the field. This
work provides further insight into dynamic behaviors of the vector vortex optical field and sheds
light on a new approach in manipulating micro-particles.
Citation
Rui Pin Chen,
"The Optical Angular Momentum in a Vector Vortex Optical Field," Proceedings of 2015 Photonics & Electromagnetics Research Symposium, Prague, July 6 - 9,Page(s)1870-1872