Franz-Keldysh effect on Landau levels and magnetoexcitons in quantum wells

We consider the optical properties associated with the-photoexcitation and radiative recombination of electron-hole pairs and excitons in intrinsic qu antum wells in an,unusual high-field regime, namely, in the presence of a s trong de electric field in the quantum-well plane and a crossed static magn etic field aligned with the growth direction. We find Landau-level-like osc illatory structure in the optical density well below the lowest Landau leve l or magnetoexciton when the electric field is:present.