Optical spectroscopy of two-dimensional electrons in a single GaAs-AIGaAs heterojunction
Kukushkin I. V. , von Klitzing K., Ploog K.
The radiative recombination of 2D electrons with nonequilibrium photoexcited holes in single GaAs-AlGaAs heterojunctions has been studied. Two different channels for recombination of 2D electrons—with free holes and with holes bound to acceptors—have been detected experimentally. The splitting of emission lines into Landau levels, which depends exclusively on the normal component of the field, has been observed in a magnetic field.