Room temperature photoreflectance spectra of as-grown step-like QW structure (i) and structure (ii).
Photoreflectance spectra (solid lines) measured at for as-grown (a) and annealed QW structure (b) together with Kramers–Kronig modulus (dashed lines).
Band diagram of the step-like QW structure obtained on the basis of the matching of theoretical calculations with experimental data. This diagram has been obtained for the following parameters: for and for interfaces; .
The energy difference between the second and the first electron level vs the electron effective mass. Calculations were performed for different depths of the electron QW, i.e., different band gap alignments. The solid, dashed and dotted lines correspond to , 0.85, and 0.9, for interface, respectively, at for interface.
Energies of QW transitions vs the for interface. The solid, dashed and dotted lines correspond , 0.9, and 1.0, for interface, respectively.
Comparison of photoluminescence and photoreflectance spectra in the vicinity of the ground state transition for the as-grown QW structure.
Comparison of photoluminescence and photoreflectance spectra in the vicinity of the ground state transition for the annealed QW structure.
Comparison of the photoluminescence line shape for the as-grown (dashed line) and annealed (solid line) QW structure.
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