Abstract
We discuss recent work on resonant inelastic light scattering by multilayer and single-layer two-dimensional electron gases in semiconductors. The multilayer systems occur in doped multiple -quantum-well GaAs(AlGa)As heterostructures. The single layers are at doped (GaAs-(AlGa)As heterojunctions; and at InAsMOS interfaces. Light scattering spectra display a wealth of information related to intersubband excitations. We consider in detail the depolarization field effects of collective electron-electron interactions: and correlations between spectral line shapes and transport properties.
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