Abstract
Spatiotemporal dynamics of the polarisation state of laser radiation performed by lens-axicon combinations were investigated theoretically and numerically in the paraxial regime. We demonstrate that in this case, while the static polarisation state does not change, various features are observed in the temporal dynamics, including spiral trajectories of the field components, transformation of the polarisation state and the “disappearance” of the light field at some time moments of the harmonic period. The results obtained can be useful for understanding the effects of spatiotemporal polarisation transformations of laser radiation, which is crucial in the field of ultrastrong and ultrashort laser-matter interactions.
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