General laws of the propagation of ultrafast vortices in free space
Miguel A. Porras,
Raúl García-Álvarez
Abstract:We conduct a theoretical study of the propagation of few-cycle, ultrafast vortices (UFVs) carrying orbital angular momentum (OAM) in free space. Our analysis reveals much more complex temporal dynamics than that of few-cycle fundamental Gaussian-like beams, particularly when approaching the single-cycle regime and the magnitude of the topological charge l is high. The recently described lower bound |l| to the number of oscillations of UFVs with propagation-invariant temporal shape (isodiffracting UFVs) is foun… Show more
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