MAGNETO-OPTICAL STUDIES OF SEMICONDUCTORS WITH AN OPTICALLY PUMPED FAR INFRARED LASER F. MULLER, S. HUANT, K. KARRAI, G. DAMPNE, M. GRYNBERG, G. MARTINEZ and L.C. BRUNEL J. Phys. Colloques, 48 C7 (1987) C7-717-C7-719 DOI: 10.1051/jphyscol:19877176