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Typical photoluminescence and depolarized inelastic light-scattering spectrum of the intersubband excitations of a 2D hole gas. The inset is a schematic of the intersubband transitions involved in the light-scattering process.
(a) Depolarized and (b) polarized inelastic light-scattering spectra of the intersubband excitations of a 2D hole gas at various excitation energies. The spectra have been offset for clarity.
Inelastic light-scattering spectra of the intersubband excitations of 2D hole gases at two different hole concentrations. The peak energies of the SDE (dashed line) and CDE (solid line) are shown by arrows.
The dependence on hole density of the depolarization shift squared and the energy splitting of the CDE and SDE peaks. The lines are a guide for the eye.
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