Subwavelength beams with polarization singularities in plasmonic metamaterials

We investigated the diffraction behavior of plasmonic Bessel beams propagating in metal-dielectric stratified materials and wire media. Our results reveal various regimes in which polarization singularities are selectively maintained. This polarization-pass effect can be controlled by appropriately...

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Bibliographic Details
Published in:Physica scripta 2014-09, Vol.T162 (1), p.14045
Main Authors: Zapata-Rodríguez, Carlos J, Caballero, María T, Martínez, Luis E, Miret, Juan J
Format: Article
Language:English
Subjects:
artificially engineered materials
diffraction
singular optics
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Summary:We investigated the diffraction behavior of plasmonic Bessel beams propagating in metal-dielectric stratified materials and wire media. Our results reveal various regimes in which polarization singularities are selectively maintained. This polarization-pass effect can be controlled by appropriately setting the filling factor of the metallic inclusions and its internal periodic distribution. These results may have implications in the development of devices at the nanoscale level for manipulation of polarization and angular momentum of cylindrical vector beams.
ISSN:0031-8949
1402-4896
DOI:10.1088/0031-8949/2014/T162/014045