L_1.mp4 Evgeny Ostrovsky 10.6084/m9.figshare.5558791.v1 https://opticapublishing.figshare.com/articles/media/L_1_mp4/5558791 Continues control over Optical Vortices for Plasmonic lens of Topological Charge of 1 2018-03-07 23:01:56 Plasmons Singular Optics phase singularity polarization singularities Optical Vortices