Unipolar pulses have a nonzero electric pulse area (integral of the electric field strength with
respect of time in a given point of space). Due to unidirectional action on charges they can …

In recent years, progress has been made in obtaining extremely short electromagnetic
pulses up to single-cycle and unipolar half-cycle pulses. For pulses with such a dependence …

A review is presented of recent works on optical unipolar pulses, whose electric area
(integral of the electric field strength over time) is nonzero, which determines the …

The photoionization yield is analyzed for three-dimensional quantum systems with finite
number of discrete spectrum states driven by unipolar subcycle and few-cycle …

We investigate theoretically the nonresonant excitation of vibrational levels in polar
molecules by unipolar radiation pulses of duration much shorter than the characteristic …

The interaction of subcycle pulses with quantum systems is considered when the pulse
duration becomes much smaller than the timescales of electron oscillations. We show …

We perform an alternative approach to produce highly unipolar terahertz pulses. The idea is
based on the nonuniform amplification of seed ultrashort carrier-envelope phase (CEP) …

The most typical way to optically control population of atomic and molecular systems is to
illuminate them with radiation, resonant to the relevant transitions. Here we consider a …

We study theoretically a possibility of creation and ultrafast control (erasing, spatial
frequency multiplication) of population density gratings in a multi-level resonant medium …

Energy, pulse duration, and frequency of the spectral maximum are important characteristics
of pulsed terahertz radiation. The unipolarity of radiation is another characteristic that is paid …