The spatial structure of the Fourier image of a quasi-cylindrical wave field excited at the effect of a femtosecond laser pulse focused into a strip on the conductor has been studied. In all areas above the conductor surface, except for the near zone, analytical dependencies of the Fourier image of the field on the coordinates and physical characteristics of the conductor and laser pulse are established. The areas in which the quasi-cylindrical wave field dominates the surface wave field are found. For a typical metal, a comparison of quasi-cylindrical and surface wave magnetic field shapes generated on the conductor surface is performed.
Nonlinear generation of the quasi-cylindrical and surface waves in terahertz frequency domain under exposure of a femtosecond laser pulse focused into a strip on a metal was studied. Competition between generated waves is determined by the value of the product of electron collision frequency and laser pulse duration. Comparison of magnetic field pulses of the quasi-cylindrical and surface waves generated on the surface is given for gold, silver, and aluminum. It is shown that far from the focusing strip the surface wave pulse contains oscillations arising due to frequency dispersion.
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