Abstract
The intrinsic photoluminescence of high mobility and dense two dimensional electron gas in symmetric narrow GaAs quantum wells has been investigated in magnetic fields up to 22 T and temperatures from 1.7 to 60 K . The observation of a new emission line seen below the ground state recombination and showing a saw-tooth like behaviour with the magnetic field is reported. This transition is tentatively attributed to red shifted replica of a recombination process involving electrons from the Fermi level.
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