ИСТИНА

We have recently found that nanocomposite thin CuSe/Se films with a thickness of about 100 nm thick generate a polarization-sensitive photocurrent under the action of femtosecond laser pulses obliquely incident on the film [1-3] with the direction of the photocurrent being reversed when the sign of the angle of incidence changes. For the elliptical polarization of the incident radiation, the transverse photocurrent, which is generated in the plane perpendicular to the plane of incidence, consists of circular and linear components that either depend or do not depend on the sign of the circular polarization, respectively. In this paper, it is shown that transverse photocurrent pulses arising at circular and linear polarizations have different durations and change their polarity when the sign of the angle of incidence changes. With linear polarization, the photocurrent depends on the polarization azimuth according to an odd law at constant time parameters of the photocurrent pulse. With elliptical polarization controlled by a quarter-wave plate, unipolar and bipolar nanosecond photocurrent pulses are generated, the temporal shape of which depends on the sign of circular polarization according to an odd law determined by the interference (interaction) of photocurrent pulses arising due to the linear and circular surface photovoltaic effect.