Uniaxial compression influence on electroluminescence spectra inp-Al_xGa_1−xAs/GaAs_1−yP_y/n-Al_xGa_1−xAs heterostructures

Abstract

We present new results on the influence of uniaxial stress up to P = 400 MPa along [110] direction on the electroluminescence (EL) spectra of p-Al x Ga 1−x As/GaAs 1−y P y /n-Al x Ga 1−x As double heterostructures. With increasing stress, the emission spectra demonstrate a blue shift of up to 20 meV at a pressure of P = 400 MPa, while the EL intensity increases under compression. The results are discussed in terms of changes in the band structure under uniaxial compression.