Atoms, Spectra, Radiations

JETP Letters

, 88:418

First online:

Polarization singularities in partially coherent combined beams

  • Ch. V. FeldeAffiliated withChernovtsy National University
  • , A. A. ChernyshovAffiliated withChernovtsy National University
  • , G. V. BogatyryovaAffiliated withNational Technical University “Kiev Polytechnic Institute”
  • , P. V. PolyanskiiAffiliated withChernovtsy National University Email author 
  • , M. S. SoskinAffiliated withInstitute of Physics, National Academy of Sciences of Ukraine

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Vector singularities are predicted and discovered experimentally in partially polarized combined fields formed by incoherent superposition of orthogonally polarized beams. Such singularities are U contours with zero degree of polarization and isolated P points with unit degree of polarization centered at vortices of the orthogonally polarized component of the combined beam. Crossing a U contour switches the polarization state to the orthogonal one. The above-mentioned singularities are adequately described in terms of the complex degree of polarization in the Stokes-space representation. It is shown that the field elements corresponding to the extrema of the complex degree of polarization form the vector skeleton of a partially coherent nonuniformly polarized field.

PACS numbers

42.25.Ja 42.25.Kb 42.30.Ms