Concentration gratings in an electron-hole plasma during its drift in an alternating electric field

This paper discusses bipolar drift under the action of a time-variable electric field of a slightly extrinsic, electron-hole plasma in a semiconductor with a weak pilot grating of the ratio of the electron and hole mobilities. The variable character of the field allows the role of the contact phenomena to be reduced. It also reduces the effect of the escape of the carriers from the active zone of the grating. Drift in an alternating field (as in a static field) creates high-contrast plasma concentration gratings, with the transmitted current efficiently controlling the parameters of such a grating and the relationship of its steady-state and oscillating components. As the current increases, the oscillating component of the plasma grating damps out, and the grating tends to a steady-state asymptotic limit