Role of Coulomb interactions in dark-bright magnetoexciton mixing in strained quantum wells
Role of Coulomb interactions in dark-bright magnetoexciton mixing in strained quantum wells
Coupled magneto-exciton states between allowed (`bright') and forbidden (`dark') transitions are found in absorption spectra of strained In$_{0.2}$Ga$_{0.8}$As/GaAs quantum wells with increasing magnetic field up to 30 T. We found large (~ 10 meV) energy splittings in the mixed states. The observed anticrossing behavior is independent of polarization, and sensitive …