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On the Burgers vector of a wave dislocation
2009
Journal of Optics. A, Pure and applied optics
Following Nye and Berry's analogy with crystal dislocations, an approach to the Burgers vector of a wave dislocation (phase singularity, optical vortex) is proposed. It is defined to be a regularized phase gradient evaluated at the phase singularity, and is computed explicitly. The screw component of this vector is naturally related to the helicoidal twisting of wavefronts along a vortex line, and is related to the helicity of the phase gradient. The edge component is related to the nearby
doi:10.1088/1464-4258/11/9/094002
fatcat:f4g7uiwkfvbdnibt6tbgnnrdji