Photoluminescence study of nitrogen effects on confined states in GaAs1−xNxGaAs quantum wellsI. Dhifallah, S. Aloulou, A. Bardaoui, J. C. Harmand and R. ChtourouEur. Phys. J. Appl. Phys., 47 3 (2009) 30302DOI: https://doi.org/10.1051/epjap/2009107