Deep-level luminescence in AlxGa1−xAs double-heterostructure lasers

Abstract
It is shown that the deep level (∼1.0 eV) luminescence observed in double‐heterostructure lasers originates from the E3 radiation damage trap (Ga vacancy) or a closely related vacancy‐donor complex in the n‐type GaAs substrate region rather than in the active region as had been reported previously.