Abstract
An analytical expression based on the paraxial approximation describing the propagation of a subcycle axicon Gaussian laser pulse in vacuum is obtained. The broad spectrum of the ultrashort pulse is given in terms of a Taylor series in the main wave frequency. The spatial and temporal characteristics of the pulse are strongly coupled. The model is used to consider electron acceleration by the light pressure of an intense subcycle laser pulse. The pulse model can also be applied to other short pulse profiles.
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