BEAM INSTABILITY AND SPACE-CHARGE WAVE AMPLIFICATION IN A SEMICONDUCTOR PLASMA

The amplification of a space-charge wave in a semiconductor induced by the beam instability is considered. The electron beam is regarded as being injected out of the quantum well by means of resonant tunneling. The plasma-beam interaction is treated in terms of the hydrodynamic e quations of a two-component liquid and the Poisson equation. The incre ment of SCW is calculated and the dependence of the increment on the d ifferent parameters such as temperature, carrier concentration, spacin g of grating, and so on is also considered.