Abstract
We show by magnetoluminescence and photoluminescence excitation spectroscopy that the density of the two-dimensional electron gas in a GaAs/As asymmetric modulation-doped multiple quantum-well structure is changed when the sample is excited with photons having an energy lower than the alloy band gap.
- Received 25 September 1992
DOI:https://doi.org/10.1103/PhysRevB.48.1967
©1993 American Physical Society