Degree of circular polarization in II–VI diluted magnetic semiconductor quantum dots Original Research Article

Degree of circular polarization (DCP) in II–VI diluted magnetic semiconductor quantum dots (QDs) has been studied analytically. Energy levels have been calculated using Luttinger–Kohn Hamiltonian and effective mass approximation. Effects due to application of externa magnetic field have been investigated, followed by calculation of transition dipole moment and DCP. Numerical estimates made for Mn-doped CdSe/ZnSe QDs show that DCP in undoped QDs is negligible while transition metal ion doping yields substantial polarization rotation (≈−2.20%≈−2.20%) even at moderate magnetic fields (View the MathML source≈0.5T).