Bezryadina, Anna Neshev, Dragomir N. Desyatnikov, Anton S. Young, Jack Chen, Zhigang Kivshar, Yuri S. Media 5: Observation of topological transformations of optical vortices in two-dimensional photonic lattices Originally published in Optics Express on 04 September 2006 (oe-14-18-8317) oe;media;photonic lattices;Optics Express;topological transformations;vortice;04 September 2006 2006-09-04
    https://opticapublishing.figshare.com/articles/media/Media_5_Observation_of_topological_transformations_of_optical_vortices_in_two-dimensional_photonic_lattices/4934843
10.1364/OE.14.008317.m005