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physics.optics2007★ 7 cited
Topology of Knotted Optical Vortices
Ji-Rong Ren, Tao Zhu, Yi-Shi Duan
Optical vortices as topological objects exist ubiquitously in nature. In this paper, by making use of the -mapping topological current theory, we investigate the topology in the…
physics.optics2007★ 6 cited
Topological Properties of Spatial Coherence Function
Ji-Rong Ren, Tao Zhu, Yi-Shi Duan
Topology of the spatial coherence function is considered in details. The phase singularity (coherence vortices) structures of coherence function are classified by Hopf index and Br…