Real (a) and imaginary (b) parts of of at room temperature for , 0.099, 0.198, 0.315, 0.419, 0.491, 0.590, 0.700, 0.804, and 1.00. Data are from Ref. 2, except those for are from Ref. 9. Successive spectra are offset by 3 in (a) and (b).
Dielectric function of from the model of Ref. 5. The unphysical oscillators are indicated by the arrows.
Schematic of a single CP structure in the PM.
Dielectric function of together with the PM reconstruction from which the CP parameters were extracted.
Amplitudes (a) and linewidths (b) of , , , and as a function of . The dots are the parameters and the solid lines are the cubic fits.
As Fig. 5, for the energies of the CP. The triangles and solid curve are from the current work, and the circles and dashed curve are from Ref. 2.
Comparison of data (open circles) with spectra (solid lines) reconstructed from the parameters of Table III for .
A model QW structure without (a) and with (b) thick interface layers.
spectra of a QW structure calculated, assuming an alloy interface (solid line), a physically mixed interface (EMA, dots), and no interface (dashed line). The overall thickness is the same in all cases.
PM parameters for . Entries marked with an asterisk are taken to be independent of and do not appear in Table II.
Compositionally dependent PM parameters for the alloys for which data are available.
Compositional dependence of the parameters in Table II as approximated by the cubic .
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