Abstract:
The possibility to control the temporal electric field profile of unipolar pulses in a multi-level resonant medium is shown when excited by a series of subcycle pulses. The atomic hydrogen was considered as the medium, keeping 5 lowest energy levels in its energy-level structure. Upon the excitation of an optically thick layer of atomic hydrogen by two subcycle attosecond pulses, localized pulses of varying profile were obtained in the layer emission. In particular, unipolar pulses of tailored waveshape and of several femtoseconds in duration, such as rectangular-shaped or triangular-shaped ones, were obtained for certain types of the spatial dependence of the medium density along the layer.
Keywords:few-cycle pulses, electric pulse area, unipolar pulses, light-matter interaction.
Fulltext:
PDF file (611 kB)