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.

中文翻译：

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飞秒脉冲效应对金属激发的准圆柱和表面波的竞争

研究了飞秒激光脉冲在金属上聚焦成条带后，在太赫兹频域内非线性产生准圆柱和表面波的情况。产生的波之间的竞争取决于电子碰撞频率与激光脉冲持续时间的乘积值。对于金，银和铝，给出了在表面上产生的准圆柱和表面波的磁场脉冲的比较。结果表明，远离聚焦带，表面波脉冲包含由于频率色散而引起的振荡。