Monte Carlo simulation of hot electron transport in quantum well heterostructures under Ggr L intervalley transfer
Monte Carlo simulations of electron transport in AlxGa1-x As/GaAs/InyGa1-yAs double quantum well heterostructures in high lateral electric fields are carried out. It is shown that, under the conditions of intervalley Ggr-L electron transfer, there exists a population inversion between the first and the second quantum-confinement subbands in the Ggr valley. The population inversion appears in fields exceeding 4 and 5.5 kV cm-1 at 77 and 300 K, respectively. The gain in a superlattice composed of such quantum wells is estimated to be on the order of 100 cm-1 for radiation with a wavelength of 12.6 µm.