Spin polarization in GaAs LED, the effect of phonon interaction

We present a model based on quantum Langevin equation for degree of spin polarization of the light emitted from GaAs LED. Using this model the effect of electron–phonon interaction on spin polarization at constant magnetic field and room temperature is investigated. Variation of degree of polarization with temperature and magnetic field for different values of electron–phonon interaction is also studied. It is found that electron–phonon interaction favors the degree of polarization at given temperature and magnetic field.