Vy. Aleshkin et Aa. Andronov, GIANT POPULATION-INVERSION OF HOT-ELECTRONS IN GAAS ALAS TYPE HETEROSTRUCTURES WITH QUANTUM-WELLS/, JETP letters, 68(1), 1998, pp. 78-83
The heating of electrons in an AlxGa1-xAs/GaAs (x>0.42) heterostructur
e in a lateral (directed along the heterointerfaces) electric field is
studied. Population inversion on the size-quantization subbands of th
e Gamma valley of GaAs and a giant population inversion between the X-
valley states of AlxGa1-xAs and Gamma-valley states of GaAs are pre di
eted. The possibility of using these inversions for achieving stimulat
ed IR emission is discussed. (C) 1998 American Institute of Physics.