OPTICAL TRANSITION ENERGIES FOR LEAD-SALT SEMICONDUCTOR QUANTUM WELLS

摘要: The quantized states for electrons and holes confined in lead-salt semiconductor quantum wells (QW's) grown on (100) (111) substrates the corresponding electric-dipole optical transition energies are calculated analytically, within envelope function approximation with Dimmock two-band $\stackrel{\ensuremath{\rightarrow}}{k}\ensuremath{\cdot}\stackrel{\ensuremath{\rightarrow}}{p}$ model bulk. solution takes into account nonparabolicity, anisotropy, break of valley spin degeneracy, due to confinement. Transition different PbTe QW's, as a temperature well width, shown give fair description observations size effect reported literature. Limitations spherical parabolic approximations electronic structure QW's made clear Rashba spin-orbit term effective Hamiltonian is derived.