Media 4: Polarization singularities of focused, radially polarized fields R. W. Schoonover T. D. Visser 10.1364/OE.14.005733.m004 https://opticapublishing.figshare.com/articles/media/Media_4_Polarization_singularities_of_focused_radially_polarized_fields/4934462 Originally published in Optics Express on 12 June 2006 (oe-14-12-5733) 2006-06-12 00:00:00 12 June 2006 media singularitie radially Polarization Optics Express oe